Question 453254
-x+6y=54	.............1				
y=9-3x	---------2				
y=9-3x					
Plug the value of y in (1)											
-1x+6(9-3x)=54
-1x+54	-18x=54			
-1x-18x	=54-54				
-19x=0								
x=	0										
Plug the value of x in (1)											
-x+6y=54					
-1*0+6y=54				
6y=54						
6y=54								
/6										
y=9										
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-2x-8y=	22	.............1	
-6x-y=	20	.............2	
Eliminate y								
multiply (1)by 		1						
Multiply (2) by		-8						
-2x-8y=22		
48x++8y=-160		
Add the two equations								
46x=-138		
/46							
x=-3						
plug value of 			x	in (1)				
-2x-8y=	22		
6-8y=22		
-8y=22-6
-8y=16		
y=-2