Write a system of equations to describe the situation below, solve using any method, and fill in the blanks. Alvin and Kirk both plan to run for a spot on the school board in their city. They must each collect a certain number of signatures to get their name on the ballot. So far, Alvin has 11 signatures, but Kirk just started and doesn't have any yet. Alvin is collecting signatures at an average rate of 7 per hour, while Kirk can get 18 signatures every hour. Assuming that their rate of collection stays the same, eventually the two will have collected the same number of signatures. How many signatures will they both have? How many hours will have gone by? Alvin and Kirk will each have collected in hours.​