Question 738553
Part I	6.50%		per annum	-------------	Amount invested =x	
Part II	7.20%		per annum	------------	Amount invested = y	
	12000					
Interest-----	811.50	for one year				
						
Total investment						
x	+		y=	12000	-------------1	
Interest on both investments						
6.50%	x	+	7.20%	y=	811.5	
Multiply by		100				
6.5	x	+	7.2	y=	81150.00	--------2
Multiply (1) by			-6.5			
we get						
-6.5	x	-6.5	y=	-78000.00		
Add this to (2)						
0	x	0.7	y=	3150		
divide by		0.7				
			y	=	4500	
Part I	6.50%	$	7500			
Part II	7.20%	$	4500			
						
CHECK						
7500	---------	6.50%	-------	487.50		
4500	-------------	7.20%	-------	324.00		
Total			--------------------	811.50		
						
m.ananth@hotmail.ca