SOLUTION: A total of $7000 is invested:part at 10% and the remainder at 15%. How much is invested at each rate if the annual interest is $720?
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Question 352279: A total of $7000 is invested:part at 10% and the remainder at 15%. How much is invested at each rate if the annual interest is $720? Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! .15x+.10(7,000-x)=720
.15x+700-.10x=720
.05x=720-700
.05x=20
x=20/.05
x=400 amount invested @ 15%.
7,000-400=6,600 amount invested @ 10%
Proof:
.15*400+.10*6,600=720
60+660=720
720=720
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