3x + 14 = 7 - 2x
3x + 2x = 7 - 14
5x = -7
x = -7 / 5
x = -1 (2/5)
Ответ: -; отрицательный
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3x + 14 = 7 - 2x
3x + 2x = 7 - 14
5x = -7
x = -7 / 5
x = -1 (2/5)
Ответ: -; отрицательный