问题标题:
【解方程(x-120)/70=(x-120)/90帮帮忙啊~~~~】
问题描述:

解方程(x-120)/70=(x-120)/90

帮帮忙啊~~~~

焦春来回答:
  (x-120)/70=(x-120)/90   70(x-120)=90(x-120)   20(x-120)=0   x-120=0   x=120   祝学习进步,望采纳~~
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