Tickets for a school musical were $4 for adults and $3 for students. The school took in $2778 in ticket sales. There were a total of 722 people attending the musical. How many students attended?

Answer 1

4a +3s = 2778

a +s = 722

3a +3s = 3(722) = 2166

subtract that from 1st equation to get

a = 112 adults

s = 722-112 = 610 students