Ответ:
(3х + х) * 2 = 72
4х *2 =72 | :2
4х = 36 | :4
Х= 9
3х =27
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Ответ:
(3х + х) * 2 = 72
4х *2 =72 | :2
4х = 36 | :4
Х= 9
3х =27