x/(60+70)+1=x/(50+70)怎么解
问题描述:
x/(60+70)+1=x/(50+70)怎么解
答
解方程如下:
x/(60+70)+1=x/(50+70)
x/(50+70) -x/(60+70)=1
(60+70-50-70)x=120×130
10x=120×130
x=12×130
x=1560