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2x²-2x=2x²+6x-2x-6=6x-6
2x^2-2x=2(x^2+3x-x-3)
2x^2-2x=2x^2+6x-2x-6
2x^2-2x^2-6x+2x-2x=-6
-6x=-6
x=-6/-6
x=1
Mam nadzieje ze dobrze.