Question

решите уравнение 8/x-4/5x при х = -1,5

Answer 1

$\frac{8}{ x} - \frac{4}{5x} \\ \\ \frac{40 - 4}{5x} \\ \\ \frac{36}{5x} \\ \\ \frac{36}{5 \times 1.5} \\ \\ \frac{36}{7.5} = 4.8$

Answer 2

$\frac{8}{x}-\frac{4}{5x}=\frac{8*5-4}{5x}=\frac{36}{5x}\\\\x=-1,5\\\\\frac{36}{5*(-1,5)}=\frac{36}{-7,5}=-\frac{360}{75}=4,8$

Ответ: 4,8