rozwiąż :
2(x-1)-(x-1)=0
daje naj
2x-2-x+1=0
x=1
.........
2x-1-(x-1)=0
2x-2-x+1=0\
x-1=0 |+1
x=1 :)
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2(x-1)-(x-1)=0
2x-2-x+1=0
x=1
.........
2(x-1)-(x-1)=0
2x-1-(x-1)=0
2x-2-x+1=0\
x-1=0 |+1
x=1 :)