Question

x=y-3
x/2 + 2y

Valores de x e y ?

Answer 1

$x = y - 3 \\ y = x + 3$
$\frac{x}{2} + 2y = 0 \\ \frac{x}{2} + 2 \times (x + 3) = 0 \\ \frac{x}{2} + 2x + 6 = 0 \\ x + 2x = - 6 \times 2 \\ x + x = - 12 \div 2 \\ 2x = - 6 \\ x = - 3$
$y = x + 3 \\ y = - 3 + 3 \\ y = 0$
x=-3
y=0