Question

menos 5 (x menos 3) mas 2 igual a 20​

Answer 1

Respuesta:

$- 5(x - 3) + 2 = 20 \\ - 5x + 15 + 2 = 20 \\ - 5x + 17 = 20 \\ - 5x = 20 - 17 \\ - 5x = 3 \\ \\ x = - \frac{3}{5} \\ comprobación \\ - 5 \times ( - \frac{3}{5} - 3) + 2 = 20 \\ \\ - 5 \times ( \frac{ - 3 - 15}{5}) + 2 = 20 \\ \\ - 5 \times ( - \frac{18}{5} ) + 2 = 20 \\ \\ \frac{90}{5} + 2 = 20 \\ \\ 18 + 2 = 20 \\ 20 = 20$