The sum of the page numbers on the facing pages of a book is 89. What are the page​ numbers?

Question

I dont exactly know how to set this equation up.

Answer 1

x = one page
x + 1 = next page

x + x + 1 = 89------------ sum of pages is 89
2x + 1 = 89

 

2x= 88

x =44

pages are 44 and 45