Question 496722
-3	x	+	4	y	=	-19.5	.............1		
-3	x	+	1	y	=	-10.5	.............2		
Eliminate y									
multiply (1)by 		1							
Multiply (2) by		-4							
-3	x		4	y	=	-19.5			
12	x		-4	y	=	42			
Add the two equations									
9	x				=	22.5			
/	9								
x	=	2.50		OR	2  1/ 2				
plug value of 			x	in (1)					
-3	x	+	4	y	=	-19.5			
-7.5		+	4	y	=	-19.5			
			4	y	=	-19.5	+	7.5	
			4	y	=	-12			
				y	=	-3

(5/2,-3)