Anne bought a necklace for each of her three sisters. She paid $7 for each necklace. Suppose she had $9 left. Write and solve an equation to find how much money Anne had initially to spend on each sister.
THREE necklaces x 7 = 21 dollars 21 + 9 = 30 dollars initially or 10 ea
x=initial amount= ((7 x 3) + 9) / 3
