2(x-2)-3(4x-1)=9(1-x) 用不同方法解方程-2(x-1)=4解方程谢谢
问题描述:
2(x-2)-3(4x-1)=9(1-x) 用不同方法解方程-2(x-1)=4
解方程谢谢
答
2(x-2)-3(4x-1)=9(1-x)
2x-4-12x+3=9-9x
-1-10x=9-9x
10x-9x=-1-9
x=-10
-2(x-1)=4
-2x+2=4
2x=2-4
2x=-2
x=-1
-2(x-1)=4
x-1=-2
x=-2+1
x=-1