Ответ:
3(x - 7) - 2(x + 1) = - 18
3x - 21 - 2x - 2 = - 18
x - 23 = - 18
x = - 18 + 23
x = 5
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Ответ:
3(x - 7) - 2(x + 1) = - 18
3x - 21 - 2x - 2 = - 18
x - 23 = - 18
x = - 18 + 23
x = 5