Algebra 1 can anyone me with these 2 math questions?

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Sove the equation 6c + 11 = 2c + 59