algebra age question

Question

Ben is 20 years older than Daniel. Ben and Daniel first met two years ago. Three years ago, Ben was 3 times as old as Daniel.

Answer 1

Today

Daniel is D, Ben is D + 20

Three years ago

Daniel is D - 3, Ben is D + 17

Ben was three times Daniel

D + 17 = 3(D - 3)

D + 17 = 3D - 9

26 = 2D

13 = D

33 = B