Question 520657
1	x		-1	y	=	1	.............1				
3	y	=	5	+	4	x	---------2				
/	3	=									
	y	=	1.67	+	1.33	x					
Substitute y in 		(1)									
1	x		-1	(	1.67	+	1.33	x	)	=	1
1	x		-1.67	+	-1.33	x	=	1			
1	x		-1.33	x	=	1	1.67				
-0.33	x	=	2.67								
/	-0.33										
x=	-8										
Plug the value of x in (1)											
1	x		-1	y	=	1					
1	*	-8		-1	y	=	1				
-8		-1	y	=	1						
-1	y	=	9								
/	-1										
y=	-9										
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