6x-3(5x-2)=5
问题描述：
6x-3(5x-2)=5
答
6x-3(5x-2)=5
6x-15x+6=5
6x-15x=5-6
-9x=-1
x=1/9
答
6x-3(5x-2)=5
6x-(15x-6)=5
6x-15x+6=5
-9x+6=5 两边加上9x
6=5+9x
9x=1
x=1/9