Select the action you would use to solve 3x =12. then select the property that justifies that action

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

Me with this one question, and i'll upvote the brainliest answer

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie