Question 567017
2	x		-5	y	=	50	.............1	
3	x	+	1	y	=	7	.............2	
Eliminate y								
multiply (1)by 		1						
Multiply (2) by		5						
2	x		-5	y	=	50		
15	x		5	y	=	35		
Add the two equations								
17	x				=	85		
/	17							
x	=	5						
plug value of 			x	in (1)				
2	x	+	-5	y	=	50		
10		+	-5	y	=	50		
			-5	y	=	50-10
			-5	y	=	40		
				y	=	-8