当y取何值时,2(3y-4)的值比4(y-7)大8?

问题描述:

当y取何值时,2(3y-4)的值比4(y-7)大8?
过程据体点,谢谢!

2×(3y-4)-4(y-7)=8
6y-8-4y+28=8
2y+20=8
y=-6