Question 624524
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,re TY, at 28, the age wll be fractional...unusual for age problems..but interesting
<u>steven is 13 years older</u> than his sister sarah age{{{highlight(x)}}}
Together they are 25 years old. 
How old is Steven and how old is Sarah?
Question states*** believe You meant 25 
 Sarah   Steven
  x  +  (x +13) = 25
      2x =  12
       x = 6, sarah's age and Steven is 19
 Sarah   Steven
  x  +  (x +13) = 28
         2x = 15
          x = 15/2, Sarah 7 1/2 yrs old and Steven 20 1/2 years old