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18 April, 13:32

Bob has $150 in his savings account and saves $40 a month. Andrea has only $100 in her account but saves at a rate of $50 a month. When will Andrea have saved more than Bob?

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  1. 18 April, 16:03
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    X = number of months

    Bob = 150 + 40x

    Andrea = 100 + 50x

    100 + 50x > 150 + 40x

    50x > 50 + 40x

    10x > 50

    x > 5

    So starting month 6, Andrea will have saved more than Bob.
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