СРОЧНО!!! СРОЧНО!!!
Розкрийте дужки та спростіть вираз:
-(a - c) + (3 - с)=?
(х + y +7) - (х - у)=?
-3(5 – с) + Зc - 5=?
-2 (x — а — 2)=?
(5 + х) - (х – 5)=?
6 — а — x — (3 – а – x)=?​
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