The Sharks Aquatic Club recently held a fundraiser to raise money for a local charity. The swimmers received money for each lap that they swam during a one-week period. The three swimmers who raised the most money were Rita, John, and Rodell. Together they swam a total of 2125 laps. John swam three times as many laps as Rita, and Rodell swam 25 more laps than John. Write an equation to represent this situation. If the swimmers received $2 for every lap they swam, how much did Rita earn for charity?

Describe how to solve any equation in the form ax + b = c for the variable x.