Question

On Jan 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of population growth. Its population increases 7% each year. On the same day, Checkersville has a population of 70,000 people. Checkersville starts to experience a population decline. its population decrease 4% each year. During what year will the population Chessville first exceed that of Checkersville? Show work and explain steps.

So far I have this:

f(x) = 50000 * .07^x
f(x) = 70000 * .96^x

So how do I proceed? Do I use a table by putting x values and seeing when the population of Chessville will first exceed that of Checkersville?