3(X+1)=4(X-2)
展开: 3X+3=4X-8
移项: 3-(-8)=4X-3X
合并同类项: 3+8=X
即: X=11
3(x+1)=4(x-2)
去括号 3X + 3 = 4X -8
移项 3X - 4X = -8 -3
-X = -11
X =11
3(x+1)=4(x-2)
3x+3=4x-8
3x-4x=-8-3
-x=-12
x=12
3x+3=4x-8
3x-4x=-8-3
-x=-11
x=11
3(x+1)=4(x-2)
3x+3=4x-8
4x-3x=3+8
x=11