<PRE><B>Question 132445</B>
Let The age of billy be x
Grandpa Gump =63 years
grandpa gump is 2 years less then 5 times age of billy =5x-2
therefore 5x-2=63 ......(1)equation
          5x-2+2=63+2        adding +2 on both sides
          5x=63+2
          5x=65
          5x/5=65/5   divding both sides by 5
           x=13  
there fore age of billy is 13 years  we can cross check it by substituting its value in equation(1)
          5x-2=63
          5(13)-2=63
          65-2=63
          63=63   as value on left hand side is equal ot the value on right hand side therefore our answer is correct</PRE>