Question

$\left \{ {{4x-6y=-12} \atop {x+y=7}} \right.$

Answer 1

4x-6y=-12
X+y=7

X=7-y

4(7-y)-6y=-12
28-4y-6y=-12
-4y-6y=-12-28
-10y=-40
Y=-40/-10
Y=40/10
Y=4

X=7-y
X=7-4
X=3