Question

решите уравнение x-7 / x+4 = 0

Answer 1

$\frac{x-7}{x+4}=0\\x-7=0\\x=7$

Answer 2

$\dfrac{x-7}{x+4}=0\quad|\cdot(x+4)\\\\x-7=0\\\\x=7$

Ответ: x = 7