Question 478415
b+ 2a = 2,

a= -3 - b

equation1					
when a=	0	b=	2	(	0	,	2	)
when b =	0	a=	1	(	1	,	0	)
Equation 2								
when a=	0	b=	-3	(	0	,	-3	)
when b =	0	a=	-3	(	-3	,	0	)

{{{drawing(300,300,-10,10,-10,10,circle(0,2,0.3),circle(1,0,0.3),circle(0,-3,0.3),circle(-3,0,0.3),circle(5,-8,0.3),graph(300,300,-10,10,-10,10,y=-2x+2,y=-x-3))}}}

From graph you find solution is (5,-8)

2	a	+	1	b	=	2	.............1	
1	a	+	1	b	=	-3	.............2	
								
multiply (1)by 		1						
Multiply (2) by		-1						
2	a	+	1	b	=	2		
-1	a	+	-1	b	=	3		
Add the two equations								
1	a				=	5		
/	1							
a	=	5    			
plug value of 			a	in (1)				
2	a	+	1	b	=	2		
10		+	1	b	=	2		
			1	b	=	2		-10
			1	b	=	-8		
				b	=	-8.00
m.ananth@hotmail.ca