Предмет: Алгебра, автор: Аноним

7 класс по алгебре)) уравнение

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Автор ответа: krugly1981

Приводим к общему знаменателю и решаем:
(x - 4)/5 =(81 + 2x+ 4) / 9
( x - 4) / 5 = ( 2x + 85) / 9
5( 2x + 85) = 9( x- 4)
10x + 425 = 9x - 36
10x- 9x = - 36 - 425
x = - 461

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