Question 474471
10	x	+	11	y	=	26.5	.............1		
20	x	+	5	y	=	-27.5	.............2		
									
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				=	-435			
/	170								
x	=	-2.56							
plug value of 			x	in (1)					
10	x	+	11	y	=	26.5			
-25.59		+	11	y	=	26.5			
			11	y	=	26.5	+	25.59	
			11	y	=	52.09			
				y	=	4.74