SOLUTION: A part of a sum of money is invested at 5% and the other part which is three times as much as the first at 8%. The total annual interest earning is 58,000. How much is invested at

Question 996058: A part of a sum of money is invested at 5% and the other part which is three times as much as the first at 8%. The total annual interest earning is 58,000. How much is invested at each rate?
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52802) (Show Source): You can put this solution on YOUR website!
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A part of a sum of money is invested at 5% and the other part which is three times as much as the first at 8%. the total annual interest earning is 58,000. how much is invested at each rate?
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x*0.05 + 3x*0.08 = 58000.

0.05x + 0.24x = 58000,

0.29x = 58000,

x = = 200000.

3x = 600000.

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!
A part of a sum of money is invested at 5% and the other part which is three times as much as the first at 8%. The total annual interest earning is 58,000. How much is invested at each rate?

Amount invested @ 5%: $
Amount invested @ 8%: 3($200,000), or $
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