解方程：4x+6(8-x)=42急
问题描述：
解方程：4x+6(8-x)=42
急
答
x=3
答
4X+6(8-X)=42
4X+48-6X=42
4X-6X+48=42
4X-(4X+2X)=42-(42+6)
4X-4X-2X=42-42-6
0X-2X=0-6
-2X=-6
X=-6/-2
X=(-6*-1)/(-2*-1)
X=[-6*(0-1)]/[-2*(0-1)]
X=[0--6]/[0--2]
X=[0-(0-6)]/[0-(0-2)]
X=[0-0+6]/[0-0+2]
X=6/2
X=3
答
4x+6(8-x)=42
4x+48-6x=42
48-2x=42
2x=48-42
2x=6
x=6/2
x=3
答
4X+48-6X=42
-2X=-6
X=3