math

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a textbook has 50 more than two times the number of pages as a workbook. combined, they have 230 pages. how many pages are in the textbook?

  • math -

    text book = 50 + (2 x Z)

    let Z= workbook

    textbook + workbook = 230 pages

    [50+(2Z)] + Z = 230

    50 + 3Z =230

    3Z= 180

    z= 60

    Text book = 50 + 2Z

    text book = 50 + 2(60)

    Text book = 170


    REMEMBER:

    50 more, really means "plus 50" in an equation

    2 time the number of pages a work book, really mean "2Z" where Z = work book

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