Question

{2x+3y=19
{X-y=-3
O valor de x e?

Answer 1

$2x + 3y = 19 \\ x - y = - 3 \: \: \: \: \: ( \times 3) \\ \\ 2x + 3y = 19 \\ 3x - 3y = - 9 \\ \\ 5x = 10 \\ x = \frac{10}{5} \\ x = 2 \\ \\ x - y = - 3 \\ 2 - y = - 3 \\ - y = - 3 - 2 \\ - y = - 5 \\ y = 5$


Resposta final: x = 2, y = 5