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B.-3(x-y)=-3x+3y spr.-3x+3y
C.(12k-4):(-4)=1-3k spr.-3k+1
D.(2x-1):½=x-½ spr.x-½
Odp. C
B.-3(x-y)=-3x+3y
C.(12k-4):(-4)=1-3k
D. (2x-1):1/2=x-1/2
Odpowiedź A
Ponieważ (2x-1):1/2=4x-2, a nie x-1/2