Question

In 3 years Tom will be 3 times older than he was 3 years ago. How old is Tom?

Answer 1

His age now: a
His age 3 years from now: a+3
His age 3 years ago: a-3
(a+3)=3(a-3)
a+3=3a-9
a=6
*He is 6 years old now.*
3 years ago he was 3, and in 3 years from now he will be 9. 9 is 3 times 3