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6 April, 15:33

A student has some $1 and $5 bills in his wallet. he has a total of 1919 bills that are worth $5959. how many of each type of bill does he hav

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  1. 6 April, 19:13
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    X = ones, y = fives

    x + y = 19 ... x = 19 - y

    x + 5y = 59

    19 - y + 5y = 59

    19 + 4y = 59

    4y = 59 - 19

    4y = 40

    y = 40/4

    y = 10 < = = = there are 10 five dollar bills

    x + y = 19

    x + 10 = 19

    x = 19 - 10

    x = 9 < = = = there are 9 one dollar bills
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