{2y=2-4x
{5x+2y=0
5x+2-4x=0
x= -2
5*(-2)+2y=0
y=5; (x;y)=(-2;5)
{4*(-2)+2*5=2
{5*(-2)+2*5=0
{2=2
{0=0
(x;y)=(-2;5)
{2y=2-4x
{5x+2y=0
5x+2-4x=0
x= -2
5*(-2)+2y=0
y=5; (x;y)=(-2;5)
{4*(-2)+2*5=2
{5*(-2)+2*5=0
{2=2
{0=0
(x;y)=(-2;5)