SOLUTION: Mike invested a total of $14,600, part at 9% simple interest and Part 6% interest for one year. If the interest in the 9% account was $300 greater than the interest in the 6% accou

Question 180329: Mike invested a total of $14,600, part at 9% simple interest and Part 6% interest for one year. If the interest in the 9% account was $300 greater than the interest in the 6% account, how much was invested in the 9% account?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Mike invested a total of $14,600, part at 9% simple interest and Part 6% interest for one year. If the interest in the 9% account was $300 greater than the interest in the 6% account, how much was invested in the 9% account?
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Equation:
9% int = 6%int + 300
0.09x = 0.06(14000-x) + 300
Multiply both sides by 100 to get:
9x = 6(14000)-6x + 30000
15x = 30000 + 84000
x = $7600 (amt. invested at 9%)
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Cheers,
Stan H.
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