Question

(270/y-2)*30=840 какой ответ​

Answer 1

$( frac{270}{y} - 2) times 30 = 840 \ \ frac{8100}{y} - 60 = 840 \ \ frac{8100}{y} = 840 + 60 \ \ frac{8100}{y} = 900 \ \ 900y = 8100 \ \ y = 8100 div 900 \ \ y = 9$

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