Question 547100
Fund A	8.00%		per annum	---x					
Fund B	7.00%		per annum	---y					
									
x		+	y=	20000	------------------------1				
8.00%	x	+	7.00%	y=	=	$1,520.00			
Multiply by 		100							
8	x	+	7	y=	=	$152,000.00		--------2	
									
Multiply (1) by			-8						
we get									
									
-8	x	-8	y=	=		-160000.00			
									
Add this to (2)									
									
0	x	-1	y=	=		-P8,000.00			
									
divide by		-1							
									
y	=		P8,000.00		investment at 	7.00%
Balance			P12,000.00 		investment at 	8.00%
CHECK									
$12,000.00	---------	8.00%	-------	P960.00					
$8,000.00	-------	7.00%	-------	P560.00					
Total			--------------	P1,520.00