Jim has received scores of 68 and 70 on his first two 100 point tests what score must he get on his third 100 point test to keep an average of 72 or greater

Tomas used 3 1/3 cups of flour and now has 1 2/3cups left. which equation can he use to find f, the number of cups of flour he had to begin with? f+3 1/3=1 2/3 f-3 1/3=1 2/3 3 1/3f=1 2/3 f/3 1/3=1 2/3