Question

Coach Johnson is 10 years older than Tim. When Tim started football 3 years ago, Coach Johnson was twice his age. How old is Tim now?

Answer 1

13

Answer 2

Let J be Coach Johnson's age now. T will be Tim's age now.
\(J=T+10\) ; (Johnson is 10 years older than Tim)
\(J-3=2(T-3)\) ; (3 years ago, Johnson was twice as old as Tim).

Use simultaneous equations to solve for T.