Question

Уравнение 5/x+7 - 3x/x+7 = 0

Answer 1

$\frac{5}{x} + 7 - \frac{3x}{x} + 7 = 0$

x≠0

$\frac{5}{x} + 7 - 3 + 7 = 0 \\ \frac{5}{x} + 11 = 0 \\ \frac{5}{x} = - 11 \\ 5 = - 11x \\ - 11x = 5 \\ x = - \frac{5}{11} = - 0.45$