Multi step equations with variables on both sides 7a=3a+20

Plz asap can y’all explain step by step plzzz it’s for a homework

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Rosy waxes 2/3 of her car with 1/4 bottle of car wax.at this rate,what fraction of the bottle of car wax will rosey use to wax her entire car

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.