September 2018 2 11 Report

Temat: Układy równań - metoda przeciwnych współczynników

Rozwiąż równania

a) 3x+7 = 2x+4

b)6x - 20 = 3 x - 5

c)2y+4 = 7y-6

d)20z-4 = 15z + 11


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