SOLUTION: A total of $6400 was invested as follows: a certain amount at 7%, twice that amount at 10%, and the remainder at 12%. If the annual interest from the three investments was $633, ho
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Question 804898: A total of $6400 was invested as follows: a certain amount at 7%, twice that amount at 10%, and the remainder at 12%. If the annual interest from the three investments was $633, how much was invested at each rate?
a. $1900 at 12%; $3000 at 10%; $1500 at 7%
b. $2200 at 12%; $3400 at 10%; $1700 at 7%
c. $1300 at 12%; $2800 at 10%; $1400 at 7%
d. $2350 at 12%; $2700 at 10%; $1350 at 7%
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
\ +\ 0.12(6400\ -\ 3x)\ =\ 633)
Solve for 
and look for the answer with that amount at 7%.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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