Question

2/x - 3/x+7=15/x²+7x

Answer 1

$\frac{2}{x} - \frac{3}{x + 7} = \frac{15}{ {x}^{2} + 7x} \\ \frac{2(x + 7) - 3x = 15}{ x(x + 7) } \\ 2x + 14 - 3x = 15 \\ - x = 15 - 14 \\ - x = 1 \: \: \: \times ( - 1) \\ x = - 1$
espero ter ajudado