Question

Решите уравнение 8/x - 4/5x при x=-1,5

Answer 1

$\dfrac{8}{x} -\dfrac{4}{5x} =\dfrac{5*8}{5*x} -\dfrac{4}{5x} =\dfrac{40-4}{5x} =\dfrac{36}{5x} \\ \\ x=-1,5\\ \\ \dfrac{36}{5*(-1,5)} =\dfrac{36}{-7,5} =-4,8$