Question

If ann is 22 years old and terry is 10 years old, how many years ago was ann four times as old as terry

Answer 1

Let the number of years passed be x.

So,
(22-x)=4(10-x)
(22-x)=40-4x
4x-x=40-22=18
3x=18
x=6

It is 6 years ago that Ann was four times as old as terry