If 2.4 tons are transported from warehouse A and 2.4 tons are transported into warehouse B, then the ratio of warehouse A and warehouse B is 30:37 How many tons of grain should be stored in warehouse a

If 2.4 tons are transported from warehouse A and 2.4 tons are transported into warehouse B, then the ratio of warehouse A and warehouse B is 30:37 How many tons of grain should be stored in warehouse a

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Suppose a has 8 tons at first, B has 7 tons
So (8x-2.4) / (7x + 2.4) = 30 / 37
210x+72=296x-88.8
86x=160.8
x=804/430=402/215
So at the beginning, a had 402 * 8 / 215 = about 14.96 tons!
Approximately 14.96
8 × (1-1 / 4) = 6 copies
7 × 30 △ 6 = 35 copies
37-35 = 2
One portion is 2.4 △ 2 = 1.2 tons
Original A: 30 △ 6 × 8 × 1.2 = 48 tons
Original B: 48 × 7 △ 8 = 42 tons
The grain storage in warehouse A is 8 XT, and that in warehouse B is 7 XT. Then:
(8x-2.4): (7x + 2.4) = 30:37, X ≈ 1.87.
About 14.96t grain was stored in warehouse a.
Is the title wrong? It's not an integer.
If you don't understand, please ask.
If a stores 8x tons of grain, B stores 7x tons of grain
(8X-2.4)/(7X+2.4)=30：37
The solution is x = 402 / 215
8X=3216/215=14.958
So the grain stored in warehouse A is 14.958 tons.
If warehouse A is set to store x tons of grain, warehouse B will store 7x / 8 tons of grain
According to the meaning of the title:
(x-2.4):(7x/8+2.4)=30:37
solve equations:
37*（x-2.4） = 30*(7x/8+2.4)
(37-30*7/8)*x = (37+30)*2.4
43x/4 = 67*2.4
X = 14.958139
Therefore, the grain stored in warehouse A is about 15 tons.
Solution: if a stores x tons of grain, B stores 8 / 7X tons of grain
(x-2.4):(8/7x+2.4)=30:37
(x-2.4)×37=(8/7x+2.4)×30
37x-88.8=240/7x+72
37x-240/7x=72+88.8
19/7x=160.8
x=61.9
Fill in the same number in the brackets on the right to make the equation hold: 17 + () / 33 + () = 3 / 5
Let the unknown be 7
Xiao Ming finished reading a story book in three days. On the first day, he read 1 / 3 of the whole book, on the second day, he read 14 pages of the remaining 1 / 2, and on the third day, he read 30 pages
The third day (1-1 / 3) × 1 / 2 = 1 / 3
This book (30 + 14) △ 1 / 3 = 132 pages
How many pages for book friends? Consider the third day, 2 / 3x * 1 / 2-14 = 30 x = 132
From city a to city B, it takes 10 hours for a bus to complete the whole journey, and 15 hours for a truck to complete the whole journey. If two vehicles start from city a and city B at the same time, the distance between the two vehicles is 7 hours
140 kilometers. How many kilometers is the distance between the two cities? Urgent
Hello!
Two cars travel the whole journey together
（1/10+1/15）x7
=1/6x7
=7/6
7 / 6-1 = 1 / 6 of the whole distance between two cars
Whole journey = 140 △ 1 / 6 = 840km
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The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 1 / 4 of grain is transported from warehouse A and 8 tons are transported into warehouse B, the grain stored in warehouse B is 17 tons more than that in warehouse a
How many tons is the original stock in warehouse a
Let a be 8x and B be 7x
（1－1/4）8X+17=7X+8
X=9
Therefore, the original stock of warehouse A is 8 × 9 = 72 tons
Fill in the brackets according to the rules and write down the reasons: (1) 4.3.1.12.9.3.17.5 () (2) 19.4.18.3.16.1.17. ()
1. Group (4,3,1) (12,9,3) (17,5, x)
The first number minus the second number equals the third number, so x = 17-5 = 12
2. Group (19,4) (18,3) (16,1) (17, x)
The first number minus the second number equals 15, so 17-15 = 2
1. 6
2. 2
4 3 1 12 9 3 17 5（-19）
Law - 1 - 2 + 11 - 3 - 6 + 14 - 12
According to the rule (2 minus 1 plus), the next operation is still subtraction, and it is two times of the previous subtraction, that is - 24, the answer is - 19
19 4 18 3 16 1 17（2）
Rule - 15 + 14 - 15 + 13 - 15 + 11 the next one is still - 15 the answer is 2
Xiao Ming finished reading a story book in three days. On the first day, he read 1 / 3 of the book, 4 pages less, on the second day, 14 pages less, and on the third day, 30 pages less
How many pages are there in the book?
The answer is: 42 Pages
The solution is as follows
Let the whole book be x pages, and the following equation can be obtained
(1/3x-4)++30=x
The solution is: x = 42 Pages
138. Ask: the process! It's a process!
It takes 15 hours for passenger cars to go from city a to city B, and 25 hours for freight cars to go from city B to city A. the two cars start at the same time. When they meet, the freight cars travel 50 kilometers less than the passenger cars
How many kilometers apart?
The whole journey of the bus (15 + 25) = meeting
The truck went 1-5 / 8 = 3 / 8
The distance is 50 ÷ (5 / 8-3 / 8) = 200 km
Suppose that the total distance is x, the speed of passenger cars is x / 15, the speed of freight cars is x / 25, and the encounter time is x / (x / 15 + X / 25) = 75 / 8 hours, that is, (x / 15-x / 25) &; (75 / 8) = 50, then x = 200
The ratio of grain stored in warehouse A and warehouse B is 5:4. Now 25% of a is put into warehouse B, and 30 tons are transported from warehouse B
The ratio of grain stored in warehouse A and warehouse B is 5:4. Now 25% of a is put into warehouse B, and then 30 tons are transported from warehouse B. This is the same as the two granaries. How many tons of grain does warehouse a have?
Suppose that the original stock of warehouse A is x tons and that of warehouse B is y tons
x: Y = 5:4 (1), x-x / 4 = x / 4 + y-30 (2), y = X4 / 5 (3)
Substituting 3 into 2, we get: x-x / 4 = x / 4 + X4 / 5-30, we get x = 100 (ton)
A: warehouse a used to have 100 tons of grain
Fill in the blanks. (1) 1, 4, 9, 16___ ， ___ ，49，… （2）3，5，9，17， ___ ， ___ ，129 …
(1) 52 = 25, 62 = 36, the sequence is: 1, 4, 9, 16, 25, 36, 49 (2) 17 + 16 = 33, 33 + 32 = 65, the sequence is: 3, 5, 9, 17, 33, 65129 & nbsp So the answers are: (1) 25,36; (2) 33,65