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8 June, 18:49

Billy invested $18 dollars of savings in two major business enterprises which paid interest at the rate of 3% and 6%, respectively. If his annual income for these two enterprises was equivalent to a return of 5% on the entire investment, find how much he invested at 3%.

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  1. 8 June, 21:57
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    0.03x+0.06 (18-x) = 18*0.05

    Solve for x

    X=6 invested at 3% ... answer

    18-6=12 invested at 6%
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