(7/10x-5)+(7/10x-5-6)=x
问题描述:
(7/10x-5)+(7/10x-5-6)=x
答
(7/10x-5)+(7/10x-5-6)=x
0.7x-5+0.7x-11=x
0.7x+0.7x-x=5+11
0.4x=16
x=40