Question 785774
3	x	+	2	y	=	42	.............1	
Total value								
3	x	+	8	y	=	96	.............2	
Eliminate	y							
multiply (1)by		-4						
Multiply (2) by		1						
-12	x		-8	y	=	-168		
3	x	+	8	y	=	96		
Add the two equations								
-9	x				=	-72		
/	-9							
x	=	8						
plug value of			x	in (1)				
3	x	+	2	y	=	42		
24		+	2	y	=	42		
			2	y	=	42		-24
			2	y	=	18		
				y	=	9		
x=	8						
y=	9					
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