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3x-5x-5/2-1/10=0
3x-5x-25/10-1/10=0
-2x=26/10
x=-26/20
x=-130/100
x=-1,3
sprawdzamy
3*(-1,3)-5*(-1,3)-2,5-0,1=-3,9+6,5-2,5-0,1=2,6-2,5-0,1=0