salman's youth lasted one sixth of his life. He grew a beard after one twelfth more. After one seventh more of his life, he married. 5 years later, he and his wife had a son. The son lived exactly one half as long as his father, and salman died four years after his son.

How many years did salman live?

• Let Salman lived for x years
  
  Then -> X/6 + X/12 + X/7 + 5 + X/2 + 4 = X
  => x/2-x/4-x/7 = 9
  => 3X/7 = 9
  => X = 21
  
• 11 years agoHelpfull: Yes(3) No(1)
• let salman's age=x
  {(1/6)x+(1/12)x+(1/7)x+5}=son's age-4
  =(1/2)x-4
  by solving,x=84
• 11 years agoHelpfull: Yes(0) No(2)