Help on this math question ( correct answers only pls !). :)

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?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Could someone me with this question i’ve been stuck on it for 20 minutes