Question 671105
-12	x	+	27	y	=	60	.............1	
								
-6	x		-6	y	=	30	.............2	
Eliminate	y							
multiply (1)by		2						
Multiply (2) by		9						
-24	x		54	y	=	120		
-54	x		-54	y	=	270		
Add the two equations								
-78	x				=	390		
/	-78							
x	=	-5						
plug value of			x	in (1)				
-12	x	+	27	y	=	60		
60		+	27	y	=	60		
			27	y	=	60		-60
			27	y	=	0		
				y	=	0		
(-5,0) is the solution