7.2×5+8X=36.88x=36.8-368x=0.8x=0.1
7.2×5+8X=36.836+8X=36.88X=36.8-368X=0.8X=0.1
8X=36.8-7.2×58X=36.8-368X=0.8X=0.1
x如果是代表一个运算的话,那就很简单,就是x0.1,或者除于10