Rewrite the expressions as a multiple of a sum of two numbers with no common factor 16+ 30

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

Ined this is due tomorrow and i dont know the answer can you find all the exponents

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps