Subtract please helppp

Pls i’m dumb as heck i’ll give y’all so many points if that encourages you

With: label the vertices and all the elements needed. find x

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian 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? i need this done