Question

estoy en un examen me ayudan

Answer 1

Respuesta:

$( \frac{2}{5} x + 4) \times 2 = \frac{2}{5} x \\ 2( \frac{2}{5}x ) + 8 = \frac{2}{5} x \\ 2( \frac{2}{5}x ) - ( \frac{2}{5} x) + 8 =0 \\ \frac{2}{5} x + 8 = 0 \\ \frac{2}{5} x = - 8 \\ \frac{1}{5} x = \frac{ - 8}{2} \\ \frac{1}{5} x = - 4 \\ x = - 4 \times (5) \\ x = - 20$