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If one ninth of class A is transferred to class B, the number of class A and class B will be equal
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If one ninth of class A is transferred to class B, the number of class A and class B will be equal
9：（9－1－1）＝9：7
The ratio of class A to class B is 7 to 6. If the number of people transferred from Class A to class B is equal, how many people are there?
If there are x people in class A, then there are 6 / 7X people in class B
x-3=（6/7）x+3
x=42
A batch of materials were originally planned to be transported 12 times by 6 vehicles. In order to complete the task ahead of time, three more vehicles were added and asked how many times they could be transported
Equation of first degree with one variable, fast, fast
Let x times work
X*(6+3)=6*12
9X=72
X=8
It can be delivered in eight times
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