Solomon reads 4 pages of a book every 6 minutes. Which proportion could be solved to find x, the number of minutes it will take to read 9 pages
4/6 = 9/x
Solving for x:
4x = 6 * 9
4x = 54
x = 54/4
x = 13.5
It will take Solomon 13.5 minutes to read 9 pages.