Question

СРОЧНО!!!!!!!!!!!!!!

Answer 1

Ответ:

$y = \frac{10}{x + 4} - 5$

$- \frac{10}{x + 4} = - 5 - y$

$- (x + 4) \times \frac{10}{x + 4} = ( - 5 - y) \times (x + 4)$

сокращаем на общий делитель x+4:

$- 10 = ( - 5 - y) \times (x + 4)$

$- 10 = - 5x - 5 \times 4 - yx - 4y$

$- 10 = - 5x - 20 - yx - 4y$

$5x + yx = - 20 - 4y + 10$

$(5 + y)x = - 10 - 4y$

$(5 + y)x \div (5 + y) = ( - 10 - 4y) \div (5 + y)$

$x = \frac{ - 10 - 4y}{5 + y}$

$x = \frac{ - (10 + 4y)}{5 + y}$

$x = - \frac{10 + 4y}{5 + y}$