Two neighboring towns, Nash Town and Bay Town, were surveyed, and their populations were found to be x 1/3 + 2x 1/5 and 3x 1/3-
x 1/5 (in thousands), respectively, where x is the number of years since the towns were founded. (Assume that both towns were founded at the same
time.)
Find the function that gives the total population of both towns.
