Question 406604
You invest $12,000 into two diffrent accounts. One account pays 4% annual and the other account pays 2% annual intrest. the intrest earned in one year is $400. how much is invested in each fund?

...
4.00%		per annum	-------------	x
2.00%		per annum	------------	y
total investment	12000			
Interest-----	$400.00			
...

x+y=12000	------------------------1				
4.00%x+2.00%y=$400.00			
Multiply by 	100							
4x+2y=$40,000.00		--------2	
									
Multiply (1) by	-4						
we get									
									
-4x-4y	=-48000			
									
Add this to (2)									
									
-2y=-$8,000.00			
									
divide by -2							
						
y=$4,000.00	investment at 	2.00%
Balance	$8,000.00	investment at 	4.00%