SOLUTION: Equal amounts are invested at 2%, 7%, and 9% annual interest. If the three investments yield a total of $828 annual interest, find the total investment.

Question 952142: Equal amounts are invested at 2%, 7%, and 9% annual interest. If the three investments yield a total of $828 annual interest, find the total investment.

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
x=amount invested in each; T=total investment=3x
0.02x+0.07x+0.09x=$828
0.18x=$828 Divide each side by 0.18
x=$4600 $4600 was invested in each account
T=3x=3($4600)=$13800 ANSWER: The total investment was $13800.

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