Question

Решите уравнение:
1)5,7-y
---------------=8,75
5/7*3/5*2/3

Answer 1

$frac{5}{7}* frac{3}{5}* frac{2}{3} = frac{5}{7}* frac{2}{5} = frac{2}{7}$
$(frac{57}{10} -y): frac{2}{7} = frac{875}{100}$
$frac{57}{10} -y= frac{875}{100} * frac{2}{7} = frac{125}{50} = frac{25}{10}$
$y= frac{57}{10} - frac{25}{10} = frac{32}{10} =3,2$