Question 562776
10	x	+	11	y	=	-26.5	.............1	
20	x	+	5	y	=	-27.5	.............2	
Eliminate y								
multiply (1)by 		-5						
Multiply (2) by		11						
-50	x		-55	y	=	132.5		
220	x		55	y	=	-302.5		
Add the two equations								
170	x				=	-170		
/	170							
x	=	-1   			
plug value of 			x	in (1)				
10	x	+	11	y	=	-26.5		
-10		+	11	y	=	-26.5		
			11	y	=	-26.5	+	10
			11	y	=	-16.5		
				y	=	-1.50