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16 June, 13:20

Carmelo read 38 pages of a book on Monday. He read 2/5 of the remainder on Tuesday. If he still had 72 pages left to read after Tuesday, how many total pages are in carmelo's book

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  1. 16 June, 13:44
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    38 + 2 * (x-38) / 5 + 72 = x

    you put x-38 because that is the value of reminder he read on tuesday

    110 + 2 (x-38) / 5 = x

    multiply by 5

    550 = 5x-2 (x-38)

    550=5x - 2x + 76

    474=3x

    devide by 3

    x=158

    that is the number of pages
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