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6x+9=x-1
6x-x=-1-9
5x=-10 | :5
x=-2
4(x-1)=3(x-1)
4x-4=3x-3
-4+3=3x-4x
-1=-x
6x+9=x-1
6x-x=-1-9
5x=-10 :5
x=-2
4(x-1)=3(x-1)
4x-4=3x-3
4x-3x=-4-3
x=-7
-(x-1)=2
-x+1=2
-x=2-1
-x=1 :(-1)
x=-1
x=1-3(x+1)
x=1-3x-3
x+3x=-3+1
4x=-2 :4
x=-1/2
6x+9=x-1
6x-x=-1-9
5x=-10 :5
x=-2
4(x-1)=3(x-1)
4x-4=3x-3
4x-3x=-4-3
x=-7
-(x-1)=2
-x+1=2
-x=2-1
-x=1 :(-1)
x=-1
x=1-3(x+1)
x=1-3x-3
x+3x=-3+1
4x=-2 :4
x=-1/2