There are 100kg apples in the two boxes. If 12kg apples are taken out of box a and put into Box B, then box a is 4kg more than box B How many kilos each of the two boxes of original fruit

There are 100kg apples in the two boxes. If 12kg apples are taken out of box a and put into Box B, then box a is 4kg more than box B How many kilos each of the two boxes of original fruit

Set: the weight of a box of apples is XKG
Box B Apple weight ykG
According to the meaning of the title, list the following equations
(X-12) - (y + 12) = 4 (1) the key is to correctly understand the meaning of this equation. A is reduced by 12 kg and B is increased by 12 kg (don't forget to give y + 12 kg). At this time, a is 4 kg more than B
{X＋Y＝100 (2)
The method of addition and subtraction is used to solve this system of equations, that is: (1) + (2); (1) - (2) to obtain:
X=64 Y=36
In doing algebra problems, we should be careful and have a good command of Chinese. It's the key to understand the meaning of the problem accurately. In doing geometry problems, we should have reverse thinking and space imagination, and logical reasoning is the key
Let a be x and B be y
X+Y=100
x-12=Y+16
The solution is x = 64kg, y = 100-64 = 36kg
(100-12x2-4) divided by 2. No explanation
(2*12+4+100)/2=64
100-64=36
A 64, B 26, too simple, children study hard, don't use this to do exercises
A batch of cement is planned to be transported to the construction site. 25% of the total cement will be transported in the first time, and 360 tons will be transported in the second time. At that time, the ratio of the transported cement to the non transported cement is 5:3. How many tons of cement are planned to be transported,
5=+3=8,5/8=0.625,0.625-0.25=0.375,360/0.375=960
The weight ratio of the two piles of coal is 9:8. If one third of the coal is transported from pile a and 3.6 tons is transported into pile B, the weight of pile B is 5.4 tons more than that of pile a
How many tons of coal was there?
Let a have a ton, then B has 8A / 9. From the meaning of the title, 8A / 9 + 3.6-5.4 = 2A / 3, a = 8.1 ton
There are two baskets of apples. If 9 apples are taken out of basket a and put into basket B, the number of apples in the two baskets is equal. If 12 apples are taken out of basket B and put into basket a
There are two baskets of apples in a and B. if 9 apples are taken out of a basket and put into B basket, the number of apples in the two baskets is equal. If 12 apples are taken out of basket B and put into basket a, the number of apples in basket a is twice that of basket B. There are () apples in basket a?
(1) If Party A gives Party B nine, the two baskets are equal, which means that Party A has (9 × 2) more baskets than Party B
(2) If Party B gives party a 12, Party A is twice as much as Party B. that is to say, Party A has one more share than Party B, and there are (12 × 2) more
(3) B: [(9 × 2) + (12 × 2)] / (2-1) + 12 = 54 (pieces)
(4) A: 54 + 18 = 72
Suppose a has x and B has y
X-9 = y + 9 → X-Y = 18 ① → subtraction of the two formulas ① - ② arrow y = 54 to get x = 72
X+12=2×（y-12） →x-2y=-36 ②→
We get x = 72, y = 54
There are 72 in a and 54 in B
quadratic equation
A batch of cement has been transported to the construction site. 56 tons have been transported, and seven tenths of them have not been transported. How many tons of this batch of cement?
A batch of cement has been transported to the construction site. 56 tons have been transported, and seven tenths of them have not been transported. How many tons of this batch of cement?
56 ÷ (1-7/10 )
= 56 ÷ 3/10
= 56 x 10 / 3
=560 T / 3
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Take 15 coal from pile a to pile B. at this time, the weight of two piles of coal is equal. The weight ratio of pile a and pile B is ()
A. 5:3B. 4:5C. 2:5
Suppose that the original weight of coal in pile a is x and that of coal in pile B is y. from the meaning of the title, we can see that: x-15x = y + 15xx-25x = YY = 35x. The weight ratio of coal in pile a and pile B is: X: y = x: 35x = 1:35 = (1 × 5): (35 × 5) = 5:3
There are 856 apples in the two boxes. 26 apples are taken out of box a and put into box B. at this time, the number of apples in the two boxes is equal. How many apples are there in box a?
What grade is the owner of the building? If you haven't studied the equation, the number of apples in Box B is (856-26 * 2) / 2 = 402
I hope I can solve the equation y = 854 + 402 soon!
There are several bags of cement in a construction site. One fifth of the total amount is used in the first time. The second time, 30 bags are less than the first time, and 1 bag is left
50 bags, how many bags of original cement on site?
Set the original cement bag at the construction site
x-(x/5+x/5-30)=150
x-2x/5+30=150
5x-2x=120*5
3x=120*5
x=200
200 bags of cement
Take 15 coal from pile a to pile B. at this time, the weight of two piles of coal is equal. The weight ratio of pile a and pile B is ()
A. 5:3B. 4:5C. 2:5
Suppose that the original weight of coal in pile a is x and that of coal in pile B is y. from the meaning of the title, we can see that: x-15x = y + 15xx-25x = YY = 35x. The weight ratio of coal in pile a and pile B is: X: y = x: 35x = 1:35 = (1 × 5): (35 × 5) = 5:3
The weight ratio of a and B apples is 5:3. Take 12 kg from a and put it into B. at this time, B apples are 8 kg more than a apples, and two boxes of apples weigh several thousand grams
It turns out that the weight of apple in frame a is 2 × 12-8 = 16 kg more than that in frame B
Total weight of two apple frames = 16 ÷ (5-3) × (5 + 3)
=16÷2×8
=8×8
=64kg
Comprehensive formula:
(2×12-8)÷(5-3)×(5+3)
=16÷2×8
=8×8
=64kg
A: the two apples weigh 64 kg
Because if you give 12 kg to B, it's only 8 kg more. If you give 4 kg to B, you want to wait for 5-3 = 2, 2 is the 4 kg more than B, so taking 4 △ 2 / 8 = 16 kg is the 2 shares, so 16 × 4 = 48 kg
A total of 64 kg.