5x-2(7x+1)=14x
问题描述:
5x-2(7x+1)=14x
答
5x-14x-2=14x
5x-14x-14x=2
-23x=2
x=-23/2
答
5x-14x-2=14x
-9x-2=14x
-9x-14x=2
-23x=2
x=-23/2