<PRE><B>Question 420755</B>
1	x	+	2	y	=	3	.............1	
4	x	+	-1	y	=	12	.............2	
								
multiply (1)by 					1			
Multiply (2) by					2			
1	x	+	2	y	=	3		
8	x	+	-2	y	=	24		
								
Add the two equations								
								
9	x	+	0	y	=	27		
								
/	9							
								
x	=	3						
								
plug value of 			x	In (1)				
								
1	x	+	2	y	=	3		
3		+	2	y	=	3		
			2	y	=	3	+	-3
			2	y	=	0		
				y	=	0		
</PRE>