SOLUTION: Sally invested some money at 5% interest. sally also invested $66 more than three times that amount at 8%. how much is invested at each rate if so he receives $547.29 in interest

Question 1075977: Sally invested some money at 5% interest. sally also invested $66 more than three times that amount at 8%. how much is invested at each rate if so he receives $547.29 in interest after one year.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Sally invested some money at 5% interest. sally also invested $66 more than three times that amount at 8%. how much is invested at each rate if so he receives $547.29 in interest after one year.
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Interest + Interest = 547.29
0.05x + 0.08(3x+66) = 547.29
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5x + 24x + 8*66 = 54729
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29x = 54201
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x = $1869 (amt invested at 5%)
3x+66 = $5673 (amt invested at 8%)
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Cheers,
Stan H.
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