Question

414:(x+27,3)=12
В столбік

Answer 1

Ответ:

$x = 7 \frac{1}{5}$

Пошаговое объяснение:

$414 \div (x + 27.3 )= 12 \\ 414 \div (x + \frac{273}{10} ) = 12 \\ 414 \div \frac{10x + 273}{10} = 12 \\ 414 \times \frac{10}{10x + 273} = 12 \\ \frac{4140}{10x + 273} = 12 \\ 4140 = 12(10x + 273) \\ 345 = 10x + 273 \\ - 10x = 273 - 345 \\ - 10x = - 72 \\ x = \frac{36}{5} \\ x = 7 \frac{1}{5}$