Ответ:
5x - 8 = x + 4
5x - x = 4 + 8
4x = 12
x = 12 : 4 = 3
x = 3
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Ответ:
5x - 8 = x + 4
5x - x = 4 + 8
4x = 12
x = 12 : 4 = 3
x = 3