Question 557815
Investment I	10.00%		per annum	----x					
Investment II	8.00%		per annum	----y					
									
x+y=	100000	------------------------1				
10.00%	x+8.00%	y=$8,800.00			
Multiply by 		100							
10x+8y=	$880,000.00		--------2	
									
Multiply (1) by			-10						
we get									
									
-10x-10	y	=-1000000.00			
									
Add this to (2)									
									
-2	y	=		-$120,000.00			
									
divide by		-2							
									
y	=		$60,000.00		investment at 	8.00%
Balance			$40,000.00		investment at 	10.00%
CHECK									
$40,000.00			$4,000.00						
$60,000.00			$4,800.00						
Total			$8,800.00