Question

Помогите срочно с уравнением!

Answer 1

Ответ:

$\frac{y + 1}{2} + \frac{7y - 7}{5} - \frac{9 - y}{10} = 1$

$\frac{5(y + 1)}{10} + \frac{2(7y - 7)}{10} - \frac{9 - y}{10} = 10$

$\frac{5y + 5 + 14y - 14 - 9 - y}{10} = 10$

$5y + 5 + 14y - 14 - 9 - y = 10$

$20y - 18 = 10$

$20y = 10+ 18$

$20y = 28$

$y = \frac{28}{20} = \frac{7}{5}$