If Nayeli and Filémon have the same number of pages left, the number of pages is: 20 pages.
Let assume that after x hours Nayeli and Filémon will have the same number of page left
Hence:
75-11x=40-4x
Collect like term
7x=35
Divide both side by 7x
x=35/7
x=5
Hence:
75-11x where x=5
75-11(5)
=75-55
=20 pages
Therefore if Nayeli and Filémon have the same number of pages left, the number of pages is: 20 pages.
Learn more about number of pages here:https://brainly.com/question/23123709
#SPJ1