Question

4. Resuelve :
5x - y = 3
-2x+4y=-12 ​

Answer 1

Respuesta:

solucion:

$\left \{ {5x-y=3} \atop {-2x+4y=-12}} \right. \\\\\left \{ {{y=-3+5x} \atop {-2x+4y=-12}} \right. \\\\-2x+4(-3+5x)=-12\\\\x=0\\\\y=-3+5x0\\\\y=-3\\\\(x,y)=(0,-3)\\\\\left \{ {{3=3} \atop {-12=-12}} \right. \\\\(x,y)=(0,-3)\\\\x=0\\\\y=-3$

saludos