Question

considere o seguinte sistema:
$\binom{3x + 2y = 14}{2x + y = 8}$, determine o valor do x e do y. Escreva o par ordenado.​

Answer 1

$\left \{ {{3x+2y=14} \atop {2x+y=8}} \right.$

$2x+y=8\ \to\ y=8-2x$

$3x+2y=14\ \to\ 3x+2(8-2x)=14\ \to$

$3x+16-4x=14\ \to\ \boxed{x=2}$

$y=8-2x=8-2(2)\ \to\ \boxed{y=4}$

$\boxed{(x,y)=(2,4)}$