Question

{ 5x+3y= -7
{3x-3y= -9
Alguém ajuda pfv?

Answer 1

Resposta:

Explicação passo a passo:

$\frac{\left \{ {{5x + 3y = -7} \atop {3x - 3y = -9}} \right.}{8x - 0y = -16}\\\\8x = -16\\\\\x = \frac{(-16)}{8} \\\\\x = -2$

Substituindo:

$5x + 3y = -7\\\\5 * (-2) + 3y = -7\\\\(-10) +3y = -7\\\\3y = -7 + 10\\\\3y = 3\\\\y = \frac{3}{3} \\\\y = 1$