Question

Решите уравнение х-4/х+4=5

Answer 1

$frac{x-4}{x+4}=5 Leftrightarrow left { {{x-4=5(x+4)} atop {xneq-4}} right. Leftrightarrow left { {{4x=-24} atop {xneq4}} right. Leftrightarrow left { {{x=-6} atop {xneq4}} right. Rightarrow x = -6$