He Latin Club Charted A Bus To Travel To And Participate In A State Competition

he Latin Club charted a bus to travel to and participate in a state competition.  The cost for each adult to ride the bus was $25 and the cost for each student to ride the bus was $15.

A total of 17 people rode the bus.  The total paid for the bus was $305.  

Let a represent the number of adults and s represent the number of students.