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

[latex] \frac{5}{7}* \frac{3}{5}* \frac{2}{3} = \frac{5}{7}* \frac{2}{5} = \frac{2}{7} [/latex] [latex](\frac{57}{10} -y): \frac{2}{7} = \frac{875}{100} [/latex] [latex] \frac{57}{10} -y= \frac{875}{100} * \frac{2}{7} = \frac{125}{50} = \frac{25}{10} [/latex] [latex]y= \frac{57}{10} - \frac{25}{10} = \frac{32}{10} =3,2[/latex]