October 2018 1 29 Report

wykonaj działania i oblicz wartość liczbową wyrażenia. a) 3(x-1)-2 dla x=4,2 b) 2(y+6)-4(y-6) dla y=1/2 c) 3(a-8)-(5-2a) dla a=-0,5 d) 4(x-y)-(-x+y) dla x=3/2, y=-1


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