Question 501651
3	x		-1	y	=	12	.............1		
-2	x	+	11	y	=	5	.............2		
Eliminate y									
multiply (1)by 		11							
Multiply (2) by		1							
33	x		-11	y	=	132			
-2	x		11	y	=	5			
Add the two equations									
31	x				=	137			
/	31								
x	=137/31				
plug value of 			x	in (1)					
3	x	+	-1	y	=	12			
13.26		+	-1	y	=	12			
			-1	y	=	12		-13.26	
			-1	y	=	-1.26			
				y	=5/4