Marco and his dad went strawberry picking. Marco's strawberries weighed 25 pounds. If together their strawberries weighed 49 pounds. How much did his dad's strawberries weigh?
1. Marco's strawberries weigh 25 pounds. 
2. Together, Marco and his dad's strawberries weigh 49 pounds. 
3. Therefore, his dad's strawberries weigh 24 pounds.