Solve each problem by writing and solving a one-variable equation.

In the first three innings of a baseball game, the home team scored some runs. In
the rest of the game, they scored 5 runs more than the number of runs scored in
the first three innings. If the home team scored 9 runs in all, how many runs did
they score during the first three innings? How many runs did they score in the
remainder of the game? Let x = the runs scored in the first three innings.