解方程 (x-120)/70=(x-120)/90帮帮忙啊~~~~

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解方程 (x-120)/70=(x-120)/90帮帮忙啊~~~~
解方程 (x-120)/70=(x-120)/90
帮帮忙啊~~~~

解方程 (x-120)/70=(x-120)/90帮帮忙啊~~~~
(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~~

(x-120)/70=(x-120)/90;
x=120;

(x-120)÷70=(x-120)÷90
70(x-120)=90(x-120)
90(x-120)-70(x-120)=0
20(x-120)=0
x-120=0
x=120

90(x-120)=70(x-120)
x=120