Question 419114
x+y=8100	------------------------1				
8.00%x	+6.00%y=$564.00			
Multiply by 	100							
8x+6y=$56,400.00		--------2	
									
Multiply (1) by	-8						
we get									
-8x-8y=	-64800			
									
Add this to (2)									
									
-2y=	-$8,400.00			
									
divide by -2							
									
y=$4,200.00 investment at 6.00%
Balance	$3,900.00 investment at 8.00%