Lisa needs 250 yards of yarn to knit a hat. She has 185 yards of yarn and needs to buy the rest. How many yards of yarn does she need to buy?

Use the variable y to represent the number of yards of yarn she needs to buy.

Which equation represents this situation and its solution?


250y = 185; y = 55

y + 185 = 250; y = 65

y + 250 = 185; y = 65

185y = 250; y = 55