(4x-2)*30%+2=(7x+8 )*20%
问题描述：
(4x-2)*30%+2=(7x+8 )*20%
答
0.3（4x-2)+2=0.2(7x+8)
1.5(4x-2)+10=7x+8
6x+7=7x+8
x=-1
答
(4x-2)*30%+2=(7x+8 )*20%
1.2x-0.6+2=1.4x+1.6
1.2x-1.4x=1.6-2+0.6
-0.2x=0.2
x=-1
答
(4x-2)*30%+2=(7x+8 )*20%
(4x-2)*0.3+2=(7x+8 )*0.2
1.2X-0.6+2=1.4X+1.6
1.2X-1.4X=1.6+0.6-2
-0.2X=0.2
X=-1
够详细了吧!