Sarah is X years old. Thomas is 9 years older than Sarah. David is 3 times as old as Sarah. How old is David

Question

Sarah = x

thomas = x+9

david = 3x

Their total ages add to 94 so

5x+9=94

Answer 1

You have your equation already, although the problem

statement didn't originally give the total of their ages.

 

5x+9= 94

5x = 85

x = 17  ... Sarah's age

Thomas = x +9 = 26

David = 3x = 51