algebra 1

gary has 100 quarters and dimes. If the total value of the coins is $15.70, how many quarters and dimes do you have?

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  1. q(.25) + (100-q)(.1) = 15.70
    .25 q + 10 - .1 q = 15.7
    .15 q = 5.7
    q = 38
    then dimes = 100 - 38 = 62

    check
    38(.25) + 62(.1) = 15.7 yes

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