Question

Кто решит дам 25 балов ​

Answer 1

Ответ:

y равен 2 .......

......

Answer 2

$\displaystyle \frac{5y + 12}{21} = \frac{1}{4}$

$20y + 48 = 21$

$20y = 21 - 48$

$20y = - 27$

$\displaystyle y = - \frac{27}{20} = - 1 \frac{7}{20}$