Question 606505
-5	x	+	6	y	=	18	.............1	
								
15	x		-18	y	=	20	.............2	
Eliminate	y							
multiply (1)by		3						
Multiply (2) by		1						
-15	x		18	y	=	54		
15	x		-18	y	=	20		
Add the two equations								
0	x				=	74		
Ther is no solution .

The lines are parallel.