What is the first step to:

5х + Зу = 12
-x+ Зу = -6

Which is the completely factored from of xy^3-x^3y

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?

What is the area of the triangle 10 13 12