Very simple thank you and please read carefully

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

What’s the answer ? use the picture to see the problem