Question 722114
3.00	a	+	3.00	b 	=	7.50	.............1	
Total value								
5.00	a		-2.00	b 	=	9.00	.............2	
Eliminate	y							
multiply (1)by		2.00						
Multiply (2) by		3.00						
6.00	a		6.00	b 	=	15.00		
15.00	a		-6.00	b 	=	27.00		
Add the two equations								
21.00	a				=	42.00		
/	21.00							
a	=	2.00						
plug value of			a	in (1)				
3.00	a	+	3.00	b 	=	7.50		
6.00		+	3.00	b 	=	7.50		
			3.00	b 	=	7.50		-6
			3.00	b 	=	1.50		
				b 	=	0.50