3(X-2)+1=X-(2X-1)

问题描述:

3(X-2)+1=X-(2X-1)
2(X-2)-3(4X-1)=9(1-X)

3(X-2)+1=X-(2X-1)
左边乘法分配律
3X-6+1=X-2X+1
3X-5=-X+1
3X+X=5+1
4X=6
X=6÷4
X=3/2
2(X-2)-3(4X-1)=9(1-X)
2X-4-12X+3=9-9X
-10X-1=9-9X
10X-9X=-1-9
X=-10