Hayden had 2 1/2 gallons of water in his watering can. The seed packet said to use 1/4 of a gallon for peppers and 5/8 of a gallon for tomatoes. Hayden then used some of the water for lettuce. If Hayden had 3/4 gallons of water left over, about how much water did he use for lettuce?
2.5 gal water - 1/4 gal - 5/8 gal - Lettuce gal = 3/4
2.5 - 1/4 - 5/8 - L= 3/4 solve for L the amount (in gallons) used for lettuce