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3x-6=x
3x-x=6
2x=6
x=3
3(2x+3)=x-1
6x+9=x-1
6x-x=-1-9
5x=-10
x=-2
-(x-1)=2
-x+1=2
-x=2-1
-x=1
x=-1
3x-6=x
2x=6 /:2
x=3
3(2x+3)=x-1
6x+9=x-1
5x=-10 /:5
x=-2
-(x-1)=2
-x+1=2
-x=1 /:(-1)
x=-1
3x-6=x
2x=6/:2
x=3
3(2x+3)=x-1
6x+9=x-1
5x=-10/:5
x=-2
-(x-1)=2
-x+1=2
-x=1/:(-1)
x=-1