4х - 13 = 6х + 7
4х - 6х = 7 + 13
-2х = 20
х = 20 : (-2)
х = -10
Ответ: (-10).
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4х - 13 = 6х + 7
4х - 6х = 7 + 13
-2х = 20
х = 20 : (-2)
х = -10
Ответ: (-10).