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There are several books on each shelf. If you take five books from shelf B and put them on the fake shelf, the books on shelf a will be four times more than those on shelf B. If you take five books from shelf a and put them on the coat hanger, the books on shelf a will be three times as many as those on shelf B. how many books are there on shelf a and B?
A 95 B 25
The two workers, a and B, worked together to process a batch of machine parts and completed the task in 20 days. It is known that a makes three more parts a day than B, and B asks for five days' leave in the middle of the day, and the number of parts completed by B is exactly half of that of A. how many parts are there in this batch?
The number of parts completed by Party B is exactly half of that of Party A. then: Party B completes 13% of the total workload, and Party A completes 23% of the total workload; Party A's work efficiency: 23 △ 20 = 130; Party B's work efficiency: 13 △ 20-5, = 13 △ 15, = 145; 3 △ 130-145, = 3 △ 190, = 270; answer: the total number of parts is 270
There are several books on each of the two bookshelves. If you take five books from bookshelf B to bookshelf a, the books on bookshelf a are four times more than those on bookshelf B. If you take five books from bookshelf a to bookshelf B, the books on bookshelf a are three times more than those on bookshelf B. how many books are there on bookshelf A and bookshelf B?
The sum of the original unit price of a and B is 100 yuan. Due to market changes, the price of a is reduced by 10% and that of B is increased by 40%. After the price adjustment, the sum of the unit price of the two commodities is increased by 32%. How much is the original unit price of a and B?
Let a be a book and B be B book
a+5=4(b-5)
a-5=3(b+5)
a=155 b=45
2 a yuan, B yuan
a+b=100
0.9a+1.4b=132
a=18 b=82
Suppose the original unit price of a commodity is x yuan, then the original price of B commodity is (100-x) yuan
-x+(100-x)=100×.
The solution is x = 20. When x = 20, 100-x = 100-20 = 80 (yuan)
Answer: the original unit price of a and B is 20 yuan and 80 yuan respectively
1. There are 95 books on shelf a and 25 books on shelf B.
Let a and B have books X and Y respectively. According to the meaning of the title, x + 5 = (1 + 4) × (Y-5), X-5 = 3 × (y + 5). To solve this system of linear equations of two variables, we get x = 95, y = 25.
2. The unit price of a is 16 yuan and that of B is 84 yuan.
Let the original unit price of a and B be x and Y yuan respectively. According to the meaning of the question, x + y = 100, X (1-10%) + y (1 + 40%) = 100 × (1 + 32%). Solve the binary linear equation system and get x = 16, y =... Expansion
1. There are 95 books on shelf a and 25 books on shelf B.
Let a and B have books X and Y respectively. According to the meaning of the title, x + 5 = (1 + 4) × (Y-5), X-5 = 3 × (y + 5). To solve this system of linear equations of two variables, we get x = 95, y = 25.
2. The unit price of a is 16 yuan and that of B is 84 yuan.
Let y = 1 + 10% and y = 1 + 100% respectively. Put it away
It is known that the ratio of work efficiency of Party A and Party B is 5:4. How many days does it take for Party A to complete this batch of parts alone?
120 × 59 = 1361 △ 136 = 36 (days) a: it takes 36 days for Party A to make this batch of parts alone
There are 200 books in the two bookshelves. The number of books in the first bookshelf is 3 times less than that in the second bookshelf. How many books are there in the second bookshelf?
(200 + 16) / (3 + 1) = 54
(200 + 16) / (3 + 1) = 54 (this) - B
Bookshelf a = bookshelf B × 3-16
Bookshelf a + bookshelf B = 200
(b bookshelf × 3-16) + B bookshelf = 200
B = 46
The equation is solved as follows
Suppose there are x books on shelf B, then the equation x + (3x-16) = 200 = = = > 4x = 216 = = > x = 216 / 4 = 54 (Books) is listed
The solution is finished. Follow up: This is the topic of grade three in primary school. I haven't learned equation yet
Party A and Party B work together to make a batch of machine parts and complete the task in 20 days. Party A does three more than Party B every day, and Party B asks for five days' leave in the middle of the process, and Party B does nothing
Party A and Party B work together to make a batch of machine parts and complete the task in 20 days. Party A makes three more parts a day than Party B. Party B asks for five days' leave on the way, and the number of parts completed by Party B is exactly half of that of Party A. how many parts are there in this batch?
Ruoyi x a day
Then: (x + 3) * 20 = 2 * (20 - 5) * x
x = 6
Total
9 *20 + 6*15 =270
There are 102 books in a and B bookshelves. If 24 books are taken out of a bookshelf and put into B bookshelf
2 / 3 of the books on the second shelf is exactly 3 / 4 of the books on the first shelf?
Two thirds of the books on shelf B are exactly three quarters of those on shelf a
Now a is B's: 2 / 3 △ 3 / 4 = 8 / 9
There is now a ratio of 8 to 8
Original A: 48 + 24 = 72
Original B: 102-72 = 30
Now the ratio of a to B is 2 / 3:3 / 4 = 8:9
Now a: 102x8 / 17 = 48 copies
Original A: 48 + 24 = 72
Original B: 102-72 = 30 copies
x+y=102
3(X-24)/4=2(y+24)/3
y=30
x=72
There are 72 books on shelf a and 30 books on shelf B
A 72 B 30
There are 72 in a and 30 in B
Party A and Party B process 1500 machine parts respectively. Party B adopts new technology and its production efficiency is three times that of Party A. therefore, Party B takes 20 hours less than Party A to complete the task
How many parts each person processes per hour
Suppose a processes x parts per hour
1500/x-1500/3x=20
1500/x-500/x=20
1000/x=20
x=50
3x=150
Party A processes 50 parts per hour and Party B processes 150 parts per hour
There are 102 books in the two bookshelves. Take 24 books from bookshelf A and put them into bookshelf B. 2 / 3 of the books in bookshelf B are 3 / 4 of those in bookshelf a. the original books in bookshelf B are?
You can't do it with equations
(102-24)*(4/3)/*(2/3)-24=15
Party A, Party B and Party C process a batch of parts. One fifth of the known parts are processed by Party A, five seventh by Party B, and Party C processes 219 parts
219 / (1-1 / 5-5 / 7) = 2555
1-1/5-5/7=1/11
219 △ 1 / 11 = 2409
219 (1-1 / 5-5 / 7) = 2555
RELATED INFORMATIONS
- 1. There are 102 books in a and B bookshelf, 24 of which are taken from a and put into B. two thirds of B's bookshelf is exactly three fourths of a's bookshelf, and B's original books speed
- 2. There are two bookshelves. There are 600 books in bookshelf a, one third of which are borrowed from bookshelf a, and three fourths of which are borrowed from bookshelf B. after that, there are 150 more books on bookshelf a than two times of those on bookshelf B. how many books are there in bookshelf B?
- 3. Party A, Party B and Party C work together to process a batch of parts. Party A makes 20% of the total number of parts, and Party B makes 120. The ratio of the number of parts made by Party C to that made by Party B is 5:6 How many?
- 4. A total of 735 parts can be manufactured by a, B and C at the same time, How many did they build each
- 5. A, B and C workers make 876 parts at the same time. It takes 3 minutes for a, 3 minutes for B and 4 minutes for C to make a part. How many parts have they made?
- 6. Party A, Party B and Party C process a batch of parts together. Party A processes 2 / 5 of the total number of parts, 125 more than Party B. Party C processes 2 / 3 of Party B. how many parts do the three process? Write down every step
- 7. For processing the same parts, worker a processes 49 parts per hour, and worker B processes 51 parts per hour. What is the ratio of work efficiency between worker a and worker B? What is the ratio
- 8. A, B, C three students origami flowers. A 2 hours fold 42, B 3 hours fold 51, C 1.5 hours fold 33, whose work efficiency is high? Write the formula!
- 9. 】Each worker can process 16 parts a day or 21 parts B day Now the workshop is ready to complete an order for car parts. A car needs 5 parts and 3 B parts to form a set. In order to support production every day, how to arrange workers?
- 10. There are 51 people in the factory. Each of them processes 16 a parts or 21 B parts. It takes five a and three B parts to make a set. How to arrange workers The method of solving the equation,
- 11. Take out 10% of the books on shelf a and put them on shelf B. the number of books on both shelves is the same. How many more books on shelf a than on shelf B?
- 12. There are two layers of books on the shelf, a total of 144. If you take out eight books from the lower layer and put them on the upper layer, the number of books on the two layers will be the same. How many books are there on the upper and lower layers of the shelf?
- 13. There are two bookshelves of science and technology books in the library of the school. If one fifth of the books on the first bookshelf are put into the second bookshelf, the number of books on the two bookshelves is equal. If the first bookshelf has 100 books, how many books on the second bookshelf?
- 14. There are two bookshelves, a and B. There are 600 books in a bookshelf, one third of which are borrowed from a bookshelf After lending 1 / 6 of the books from bookshelf B, the number of books on bookshelf A is 100 more than twice that on bookshelf B. how many books are there on bookshelf B?
- 15. There are two bookshelves. 14 books in bookshelf A is equivalent to 25 books in bookshelf B, and there are 120 more books in bookshelf a than in bookshelf B______ Ben
- 16. There are two bookshelves A and B. the first bookshelf has 120 books. If you take 24 books from the first bookshelf to the second bookshelf, the 23 books in the second bookshelf is exactly 75% of the first bookshelf. How many books did the second bookshelf have?
- 17. There are 3000 books on the two bookshelves of a and B. two fifths of the books on the first bookshelf are 420 more than one fourth of the books on the second bookshelf How many copies? Solve the equation once It's better to use the formula method
- 18. The number of books on the upper shelf is 105 more than that on the lower shelf. After taking 25 books from the upper shelf to the lower shelf, the number of books on the lower shelf is four fifths of that on the upper shelf?
- 19. There are 120 students in grade five, three more than 10 / 9 of the students in grade six. How many students are there in grade six
- 20. The school held the track and field games. 32 people participated in the fourth grade and 126 people participated in the sixth grade, 6 less than the total number of people in the fourth and fifth grades, Equation!