Question 513553
0.5x + 2.2y = 9
6x + 0.4y = -22

multiply both equations by 10

5x+22y=90
60x+4y=-220

5	x	+	22	y	=	90	.............1	
60	x	+	4	y	=	-220	.............2	
Eliminate y								
multiply (1)by 		-4						
Multiply (2) by		22						
-20	x		-88	y	=	-360		
1320	x		88	y	=	-4840		
Add the two equations								
1300	x				=	-5200		
/	1300							
x	=	-4      			
plug value of 			x	in (1)				
5	x	+	22	y	=	90		
-20		+	22	y	=	90		
			22	y	=	90	+	20
			22	y	=	110		
				y	=	5