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?

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?

Let a make x, B make y and C make Z
X+Y+Z=876
3X=3.5Y=4Z
X=3.5Y/3 Z=3.5Y/4
X+Y+Z=876
3.5Y/3+Y+3.5Y/4=876
36.5Y=10512
Y = 288
X=3.5Y/3 Z=3.5Y/4
=3.5*288/3 =3.5*288/4
=336 = 252
A: a made 336, B 288 and C 252
Party A, Party B and Party C cooperate in a batch of parts. Party A makes 40% of the total number of parts. The ratio of the number of parts processed by Party B to Bing is 7:5. It is known that Party A makes 240 zeros more than Party C
How many parts do each of them make?
7+5=12
C accounts for 5 / 12 of B and C
1-40% = 60% of the total
The proportion of C in the total is 60% × 5 / 12 = 1 / 4
The total number is: 240 (40% - 1 / 4) = 1600
A: 1600 × 40% = 640
C: 1600 × 1 / 4 = 400
B: 1600-640-400 = 560
A 640 B 560 C 400
Let C be 5x, B = 7x
The total number of C and B is 7x + 5x = 12x
C accounts for 5 / 12 of B and C = (1-40%) = 60%
The proportion of C in the total is 60% × 5 / 12 = 1 / 4
The total number is: 240 (40% - 1 / 4) = 1600
A: 1600 × 40% = 640
C: 1600 × 1 / 4 = 400
B: 1600-640-400 = 560
There are two workshops a and B in Yonghua towel factory. There are 56 people in workshop a and 30 people in workshop B. to transfer several people from workshop a to workshop B can make the number of people in workshop B more than that in workshop a
Two times less than 10 people?
There are 56 + 30 = 86 people in the two workshops
Now there are (86 + 10) / (1 + 2) = 32 people in workshop a
There were 56 people in workshop a
Transfer out 56-32 = 24
The current number of a: (56 + 30 + 10) / (1 + 2) = 32
Number of people transferred: 56-32 = 24
There are two bookshelves. The books in bookshelf a are 45% of those in bookshelf B. If 33 books are taken from bookshelf B and put on bookshelf a, there will be as many books in both bookshelves
How many books are there on shelves a and B
0.45x+33=x-33
0.55x=66
x=120
This is written by my mother. She is a university teacher. She must be right. She chose me
If the number of male employees in a workshop is 75% of that of female employees, the number of employees in the whole workshop may be () A.30 b.40 c.56 why?
If the number of male employees in a workshop is 75% of that of female employees, the number of employees in the whole workshop may be (c)
A.30 B.40 C.56
1 + 75% = 1.75 can be divided by 7, so the total number is a multiple of 7, so it is 56
If 8 books are taken out of a bookshelf and put into B bookshelf, the number of books on the two bookshelves is the same. If 13 books are taken out of B bookshelf and put into a bookshelf,
The number of books on shelf a is twice as many as that on shelf B. There are more than one book on each of the two shelves
If the number of books on shelf B is x, the number of books on shelf a is x + 16
In the two ways, the total number of books is equal, so there is an equation
(X+8) x 2=(X-13) x 2+(X-13)
The expansion is: 2x + 16 = 2x-26 + X-13
The final solution is: x = 55
Then a bookshelf has x + 16 = 55 + 16 = 71 (this)
There are x and Y books on the two shelves
X-8=Y+8
X+13=2(Y-13)
The solution is x = 61, y = 45
There are x books on shelf a and Y books on shelf B
x-8=y+8
2(y-13)=x+13
x=71,y=55
A: there were 71 books on shelf a and 55 books on shelf B
Jiaduo 8x2 = 16
Let a x and B be x-16
x+13=2(x-16-13)
x+13=2x-58
2x-x=13+58
x=71
B 71-16 = 55
The total number of workers in this chemical plant is 56. How many are the total number of male workers and female workers?
(56 + 42) △ 27 = 98 × 72, = 343 people; answer: there are 343 people in the whole plant
A total of 300 books were collected in the two bookshelves, 20 of which were taken from bookshelf A and put into bookshelf B. the books on bookshelf B were just 7 / 8 of bookshelf A. how many books were there in the two bookshelves?
7 / 8 (x-20) = 300-x + 20. The solution is x = 180, 300-x = 120, so there are 180 books in a and 120 books in B
A: X
Already: y
x+y=300
(x-20)*7/8=y+20 -->7X-8Y=300
linear equation in two unknowns
X=180
Y=120
Application of Mathematics: there are x people in the first workshop of a factory, and the number of people in the second workshop is 30 less than 45 in the first workshop. (1) how many people are there in the two workshops? (2) If 10 people are transferred from the first workshop to the second workshop, how many more people are there in the first workshop than in the second workshop?
(1) X + (45x-30) = 95x-30 answer: there are (95x-30) people in the two workshops. (2) (X-10) - (45x-30 + 10) = 15x + 10. Answer: there are (15x + 10) more people in the first workshop than in the second
Xiaoxing's family has two bookshelves, with a total collection of 300 books. 20 books were taken from bookshelf A and put into bookshelf B, which is exactly 7 / 8 of bookshelf B. Each bookshelf had more books
Less than this?
Xiaoxing's family has two bookshelves with a total collection of 300 books, 20 of which are taken from bookshelf A and put into bookshelf B. the books on bookshelf a are just 7 / 8 of bookshelf B. how many books are there in each bookshelf?
B (300-20-20 × 7 / 8) / (1 + 7 / 8)
=262.5÷15/8
=140 copies
A 300-140 = 160