What single transformation was applied to quadrilateral A to get quadrilateral B?

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

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

What is the value of x when x + 7 = 21?