Question 669874
Total invested 60,000							
Interest-----	5400						
							
Part I	7.00%		per annum	---x			
Tax free bonds	11.00%		per annum	---y			
Total investment							
x	+	y=	60000	-------------1		
Interest on both investments							
7.00%	x	+	11.00%	y=	5400		
Multiply by		2					
7	x	+	11	y=	540000.00	--------2	
Multiply (1) by			-7				
we get							
-7	x	-7	y=	-420000.00			
Add this to (2)							
0	x	4	y=	120000			
divide by		4					
			y	=	30000		
Part I	7.00%	$	30000				
Tax free bonds	11.00%	$	30000	

			
							
CHECK							
30000	---------	7.00%	-------	2100.00			
30000	-------------	11.00%	-------	3300.00			
Total			--------------------	5400.00			
							
m.ananth@hotmail.ca