Mathematics problems in the fifth grade of Shanghai primary school

The column equation mainly answers the first question.

Solution: Suppose B traveled from place A to place B for x hours. (The equilibrium point of the equation is that both parties travel the same distance.)

Column equation 12(X+0.5-2)=9X.

12X- 18=9X

3X= 18

X=6

So the distance between AB and AB is 9×6=54 (kg).

Answer: (1) B traveled from A to B for 6 hours. (2)A and B are 54 kilometers apart.

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