Question 911438
5      	a	+	8      	b 	=	12      	.............1	
								
11      	a		-3      	b 	=	47      	.............2	
Eliminate	y							
multiply (1)by		3      						
Multiply (2) by		8      						
15      	a		24      	b 	=	36      		
88      	a		-24      	b 	=	376      		
Add the two equations								
103      	a				=	412      		
/	103      							
a	=	4      						
plug value of			a	in (1)				
5      	a	+	8      	b 	=	12      		
20      		+	8      	b 	=	12      		
			8      	b 	=	12      		-20
			8      	b 	=	-8      		
				b 	=	-1      		1
x=	4      		      				
y=	-1      		      				
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