Question

Gente Pf Me Ajudem!! 3X+Y=0 Pf gente ajuda pf
11X-Y=42

Answer 1

$\left \{ {{3x + y =0} \atop {11x - y =42}} \right. \\ \\ 14x = 42 \\ x = \frac{42}{14} \\ x = 3 \\ \\ 3x + y = 0 \\ 3 (3) + y = 0 \\ 9 + y = 0 \\ y = - 9$