November 2018 2 16 Report

Podane sumy algebraiczne doprowadź do najprostrzej postaci. Licz sprytnie!

a) -5x + 2x - (-4y) - 2x + (-4y) =

b) 4a + 7b - 13a +2b - 7b + 13a =

c) -39 + 16 - 15d + 24 - (-15d) + d + 39c =


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