October 2018 1 30 Report

Podane wyrażenia zapisz w jak najprostrzej postaci.

a) a-[a-(1-a)]
b) -x-[-(1-x)-(x-1)]
c) x-[y-(x-y)-x-(y-x)]
d) 1-a-[1-(a-1)-2a-(1-3a)]-a-1


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