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6x-2-6x-3+4=20x+15
6x-6x-20x=15+2+3-4
-20x=16/:-20
x=-16/20
6x-2-6x-3+4=20x+15
6x-6x-20x=2+3-4+15
-20x=16/:(-20)
x= -16/20
liczę na naj;**
6x-2-6x-1+4=20x+15
6x-6x-20=15-4+3+2
-20x=16/:(-20)
x=-16:20 (w ułamku napisz)