WHAT THEROM DO I USE AAS RIGHT

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

X+ y = 5 ; x - y =3 solve using linear combination

Do,h = (7, 9) (14, 18) the scale factor is