Question 1023897
.
A geometry book is comprised of two sections: planar and non-planar in the ratio 5:3. If the total number of pages in the book is 480, how many of each section will be in the book?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


There are 5x pages in one section and 3x pages in the other section.
(I do not assume now that x is integer).


In total, the number of pages is 5x + 3x = 8x.


An equation is 8x = 480.


Its solution x = {{{480/8}}} = 60. (Happily, it is integer !).


Hence, the first section contains 60*5 = 300 pages, and the second section contains 180 pages.