February 2023 1 4 Report
Перевір, чи є дані рівності тотожностями:
a) 2x - 3 + 7 = 2(2 + x);
6) 2(4 - 3) - (4 -5) = 4 + 1;
B) 3(a + 3) = a + 9.
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