Question 800479
Find the center of the circle by solving for x & y 

1	x	+	3	y	=	-7	.............1	
Total value								
3	x		-2	y	=	12	.............2	
Eliminate	y							
multiply (1)by		2						
Multiply (2) by		3						
2	x		6	y	=	-14		
9	x		-6	y	=	36		
Add the two equations								
11	x				=	22		
/	11							
x	=	2						
plug value of			x	in (1)				
1	x	+	3	y	=	-7		
2		+	3	y	=	-7		
			3	y	=	-7		-2
			3	y	=	-9		
				y	=	-3		
center (2,-3) 

point(-1,1)

Frame the equation