Question 503318
x = 2y---------------1
2x + y = -5------------2

equation1						
when x=	0	y=	0	(	0	,	0	)	    
when y =	0	x=	0	(	0	,	0	)    
Equation 2									
when x=	0	y=	-5	(	0	,	-5	)	-5    
when y =	0	x=	-2.5	(	-2.5	,	0	)

{{{drawing(300,300,-10,10,-10,10,circle(0,0,0.3),circle(0,0,0.3),circle(0,-5,0.3),circle(-2.5,0,0.3),graph(300,300,-10,10,-10,10,y=x/2,y=-2x-5))}}}
	
The solution is (-2,-1)
x=2y
-2=-1*2
-2=-2
...
2x+y=5
2*-2+(-1)*1=-5
-5=-5