If you finish early try playing some challenges on this website: https://solveme.edc.org/Mobiles.html
The two sides of the balance add to the weight on the top.
What is the mass of a bowl?
What is the mass of a cup?
What is the cost of a smoothie?
What is the cost of an ice cream cone?
CHALLENGE QUESTION
What is the smaller integer?
What is the larger integer?