Автор - llouna649

1 и 3 не нужно. Помогите пожалуйста

Ответ

Автор - ZLOYTIGROVSKIY
(4.6 - x) times 19 = 4.18 \ \ 87.4 - 19x = 4.18 \ \ - 19x = 4.18 - 87 .4 \ \ - 19x = - 83.22 \ \ x = - 83.22 div ( - 19) \ \ x = 4.38 \ \ \ \ 2)17.28 div (56 - x) = 36 \ \ frac{432}{25} times frac{1}{56 - x} = 36 \ \ frac{432}{25(56 -x )} = 36 \ \ 432 = 900 times (56 - x) \ \ 432 = 50400 - 900x \ \ 900x = 50400 - 432 \ \ 900x = 49968 \ \ x = frac{1388}{25} = 55.22
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