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Автор - hail1

найдите корень уравнения (5d)9 + 2 = 13

Ответ

Автор - korolevichna07
(5х) / 9 + 2 = 1/3
(5х) /9 = 1/3 - 2
(5х) /9 = - 5/3
5х = -5/3 х 9
5х = - 15
х = - 15 : 5
х = - 3

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