SOLUTION: A man invests 4/5 of his capital at 10.5% and the rest at 10%.His annual income is $416.Find his capital.

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Question 268443: A man invests 4/5 of his capital at 10.5% and the rest at 10%.His annual income is $416.Find his capital.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A man invests 4/5 of his capital at 10.5% and the rest at 10%.His annual income is $416.Find his capital.
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Equation:
interest + interest = 416
0.105(4/5)x + 0.1(1/5)x = 416
Multiply thru by 5000 to get:
105*4x + 100x = 5*416000
520x = 5*416000
x = $4000 (Capital invested)
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Cheers,
Stan H.