Question 820346
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
the ratio of two numbers is 12:15 and their difference is 21 
what are the numbers?  Let {{{green(12x)}}} and {{{green(15x)}}} represent the numbers
    15x - 12x = 21
           3x = 21
            x = 7,   Numbers are 84 and 105
CHECKING our answer***
   105 - 84 = 21