September 2018 1 10 Report

Zad . Usuń nawiasy i zredukuj wyrazy podobne

a) 5x + (2x - 7) - 9x - (-3x + 8) + 20 - 8x =

b) -5x + (-2y + 4x) - (7x - 8y) - x + (2 - 6y) =


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