Question 696677
Can anyone help me solve this problem ? I have no idea how to do it. An investor invested a total of $1,900 in two mutual funds, one fund earned a 7% profit, while the other earned a 4% profit. If the investor's total profit was $97, how much was invested into each mutual fund?
Principal  Equation: a + b = 1900
Interest Equation: 7a + 4b = 9700
--------------------------------------
Multiply thru 1st by 4
----------------------------
4a + 4b = 4*1900
7a + 4b = 9700
---
Subtract and solve for "a":
3a = 2100
a = 700 (amt. invested at 7%
-----
Solve for "b":
a + b = 1900
700 + b = 1900
b = 1200 (amt. invested at 4%
====================================
Cheers,
Stan H. 
Amount invested into mutual fund that earned 7% -
Amount invested into mutual fund that earned 4%-