Question 567498
Investment Part I	3.50%		per annum	----x					
Investment part II	3.00%		per annum	----y					
The sum of the investments is 	$10,000.00			
The sum of individual interests = $312.00					
x+y=	10000	------------------------1				
3.50%x+	3.00%y	=$312.00			
Multiply by 	100							
3.5x+3y	=$31,200.00	--------2	
									
Multiply (1) by			-3.5						
we get									
									
-3.5x	-3.5y=	-35000.00			
									
Add this to (2)									
									
0x-0.5y	=-$3,800.00			
									
divide by-0.5							
									
y	=		$7,600.00		investment at 	3.00%
Balance			$2,400.00		investment at 	3.50%
CHECK									
$2,400.00	@	3.50%	$84.00						
$7,600.00	@	3.00%	$228.00						
Total	--------------------		$312.00