Question 532464
3	x	+	4	y	=	-8	.............1	
1	x	+	4	y	=	4	.............2	
Eliminate y								
multiply (1)by 		-1						
Multiply (2) by		1						
-3	x		-4	y	=	8		
1	x		4	y	=	4		
Add the two equations								
-2	x				=	12		
/	-2							
x	=	-6.00						
plug value of 			x	in (1)				
3	x	+	4	y	=	-8		
-18		+	4	y	=	-8		
			4	y	=	-8	+	18
			4	y	=	10		
				y	=	10/4
y=5/2

----------------

5	x	+	4	y	=	22	.............1	
5	x	+	1	y	=	13	.............2	
Eliminate y								
multiply (1)by 		-1						
Multiply (2) by		4						
-5	x		-4	y	=	-22		
20	x		4	y	=	52		
Add the two equations								
15	x				=	30		
/	15							
x	=	2						
plug value of 			x	in (1)				
5	x	+	4	y	=	22		
10		+	4	y	=	22		
			4	y	=	22		-10
			4	y	=	12		
				y	=	3
m.ananth@hotmail.ca