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3(x-1)=4x-4
3x-3=4x-4 |-4x
(-x)-3=(-4) |+3
(-x)=(-1) |*(-1)
x=1
pozdrawiam
x=1
3x-3=4x-4
3x-4x=3-4
-1x=-1 /-1
x=1