Помогите решить! Срочно! Заранее спасибо!

6)
$\frac{m - n}{n} \times ( \frac{m}{m - n} + \frac{m}{n} ) = \frac{m - n}{n} \times \frac{mn + m(m - n)}{n(m - n)} = \frac{m - n}{n} \times \frac{mn + {m}^{2} - mn}{n(m - n)} = \frac{m - n}{n} \times \frac{ {m}^{2} }{n(m - n)} = \frac{ {m}^{2} }{ {n}^{2} }$
при m = 8, n = 5:
$\frac{ {m}^{2} }{ {n}^{2} } = \frac{ {8}^{2} }{5 {}^{2} } = \frac{64}{25}$
7)
$y = \frac{3}{x} \\ x = \frac{3}{y} \\ \\ x = \frac{2}{p} \\ p = \frac{2}{x} = \frac{2}{ \frac{3}{y} } = \frac{2y}{3} \\ \\ 2x + p = 2 \times \frac{3}{y} + \frac{2y}{3} = \frac{6}{y} + \frac{2y}{3}$