Lizzy: Sam is twice as old as Sue. Kendra is 3 times as old as Sam. If Kendra is currently 18, what will be their total age in 3 years?.
Me: Hmmm, let me think. I think this is the detailed solution:
Sam is currently 18 / 3 = 6 years old. Sue is currently 6 / 2 = 3 years old. In three years, Sue will be 3 + 3 = 6. In three years, Same will be 6 + 3 = 9. In three years, Kendra will be 18 + 3 = 21. Their total age in three years is 6 + 9 + 21 = 36. Final answer: 36.