Question 121079
Angus invested $22,000, part at 3% and part at 14%. If the total interest at the end of the year is $990, how much did he invest at 3%? 
--------------------
Let Amt. invested at 14% be "x" ; interest on this is 0.14x
----------------------
Amt invested at 3% is "22000-x" ; interest is 0.03(22000-x)=660-0.03x
-----------------------
EQUATION:
0.14x + 660-0.03x = 990
0.11x = 330
x = $3000 (amt invested at 14%)
22000-3000 = $19000 at 3%
==================
Cheers,
Stan H.