Hey what's up girl/boy well um i need a bit of , okay my question is this might sound like a baby question but whats 76x29 show your work and whats 58x46 also show your work

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