Question 550755
10	x	+	7	y	=	-120.5	.............1	
-20	x		-14	y	=	241	.............2	
Eliminate y								
multiply (1)by 		2						
Multiply (2) by		1						
20	x		14	y	=	-241		
-20	x		-14	y	=	241		
Add the two equations								
0	x				=	0

This is absurd

so the system has no solution. The lines are parallel