解方程 (x-120)/70=(x-120)/90帮帮忙啊~~~~

分类: 作业答案 • 2021-12-20 05:41:50

问题描述：

解方程 (x-120)/70=(x-120)/90
帮帮忙啊~~~~

答

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

答

(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

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~~

答

(x-120)/70=(x-120)/90；
x=120；