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x*3+1/3*3=3(x-2)+5x/2*3
3x+1=3x-6+15x/2/*2
3x*2+1*2=3x*2-6*2+15x/2*2
6x+2=6x-12+15x
6x-6x-15x=(-2)-12
-15x=14
myśle że dobrze :/