Question

does anyone know how this works or the answer to this?

Answer 1

Just translate the English language to Math's:

Let t be the age of TIM  today:

t+7 = 3(t - 19).This is the equation.

And if you want to find the age of Tim, you solve it for t:
t+7 = 3t - 57

7 +57 = 2 t and t = 32 year old