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спростіть вираз:
-(а — с) +(3 - c) = ?
-3(5 – с) + Зc — 5 = -15 +3c + 3c -5 = -20 +6c
6– а – х = (3 – а – x) = 6 — а – х - 3 +а+ х = 3
-5(a-7) + ба + 10 = ?
-(9 - 6 + х) - 36 + 5х = ?
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