October 2018 2 18 Report

Zapisz w jak najprostrzej postaci ; Jak to się robi? Proszę o wytłumaczenie .
a) a+ (a-b)
b) 2x - (x+4)
c) 7 - ( - x+6)
d) - (x+4)+(x-5)
e) 1-(t+p) - (t-2)
f) -(-y+2)+(-2y-4)


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