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20 July, 09:54

Jimmy collects nickels and dimes. Right now, he has a total of 40 coins in his piggy bank. If there are seven times as many dimes as there are nickels, how many nickels does Jimmy have?

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  1. 20 July, 13:45
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    Number of nickels plus number of dimes equals total number of coins

    so

    n + d = 40

    then they tell us that "there are seven times as many dimes as there are nickels"

    this translates to

    d = 7n

    we then plug that into our first equation

    and get

    n + 7n = 40

    then we solve for n

    add like terms

    8n = 40

    then divide both sides by 8

    n = 40/8 = 5

    therefore Jimmy has 5 nickels
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