Question 777880
-3	x	+	3	y	=	4	.............1	
Total value								
-1	x	+	1	y	=	3	.............2	
Eliminate	y							
multiply (1)by		-1						
Multiply (2) by		3						
3	x		-3	y	=	-4		
-3	x	+	3	y	=	9		
Add the two equations								
0	x				=	5		
there is no solution to this system