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29 July, 05:37

There are 20 hardcover and paperback books in a box. There are 10 more hard cover books then paperback books. Right and solve a system of linear equations to find the number of paperback books and the number of hard cover books

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  1. 29 July, 09:37
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    Let H represent hardcover

    let P represent paperback

    H + P = 20

    H = P + 10

    sub in H into the first eq'n

    (P + 10) + P = 20

    2P + 10 = 20

    2P = 10

    P = 5

    sub P into eq'n 2

    H + (5) = 20

    H = 15

    therefore there are 5 paperback books and 15 hardcover
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