Question

sistema linear
{2x+4y=-12
{-x+3y=-9

Answer 1

2x+4y= -12
2x= -12-4y
x= (-12-4y)/2
x=-6-2y

-x+3y=-9
-(-6-2y)+3y= -9
6+2y+3y= -9
5y= -15
y= -3

x= -6-2(-3)
x= 0