Marco and his dad went strawberry picking. Together they collected strawberries that weighed 43 pounds. On the way back Marco lost 19 pounds of strawberries. Marco's strawberries now weighed 21 pounds. How much did his dad's strawberries weigh?
1. Marco and his dad went strawberry picking. Together they collected strawberries that weighed 43 pounds.
2. On the way back Marco lost 19 pounds of strawberries.
3. Marco's strawberries now weighed 21 pounds.

4. How much did his dad's strawberries weigh?

We can use algebra to solve this problem. We know that the total weight of the strawberries was 43 pounds. We also know that Marco's strawberries weighed 21 pounds. So we can set up the equation:

43 pounds = 21 pounds + x

We can solve for x to find out how much his dad's strawberries weighed.

43 pounds = 21 pounds + x
43 pounds - 21 pounds = x
22 pounds = x

His dad's strawberries weighed 22 pounds.