Question 999518


2	x	+	-1	y	=	-7	.............1					
-1	y	=	-7	+	-2	x						
/	-1	=										
	y	=	7	+	2	x						
4	x	+	-3	y	=	7		.....................2				
Substitute y in		(2)										
4	x	+	-3	(	7	+	2	x	)	=	7	
4	x	+	-21	+	-6	x	=	7				
4	x		-6	x	=	28						
-2	x	=	28									
/	-2											
x=	-14      											
Plug the value of x in (1)												
2	x	+	-1	y	=	-7						
2	*	-14      	+	-1	y	=	-7					
-28      	+	-1	y	=	-7							
-1	y	=	21      									
/	-1											
y=	-21      											
m.ananth@hotmail.ca