Автор - pomogi64

Уравнение х+4=2(7/9х-4)​

Ответ

Автор - kruglenkonata804

х+4=2(7/9х-4)

х+4=14/9х-8

х-14/9х=-8-4

(9х-14х)/9=(-12*9)/9 |:9

-5х=-108

х=21,6

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