The Kesling Middle School booster club is planning a community event to raise money for the school's art department. Based on the previous events, they estimate that the event will be a sellout--filling all 300 seats in the school gym. Plans are to charge adults $8 and children $3 admission. The club wants to earn $2,000 from admission charges. Write an equation that expresses the relationship among adult attendance, child attendance, and the goal for income from admission charges. Explain what the variables represent.