1. 1) | x | + 5 = 7 2) - | x | = 9 2. 1) -4.6+(2.5+1.9) 2) -2.8+4.3+(-3.7)+2.8+(-5.8)+3.9+(-1.4)
3. знайди суму додатками якої є числа : Обернене та протилежне числу 2.4
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