Homework Help: math

Posted by james on Wednesday, February 29, 2012 at 1:50am.

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 - Rose Bud, Wednesday, February 29, 2012 at 2:22am
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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