In this activity, you will create an image and an equation to model a situation
and then solve the equation.
Roger and his friends conducted a clean-up drive at their school. They formed
three teams, Team A, Team B, and Team C, and they collected 12 pounds of
trash in all. Team B collected 3 pounds of trash, and Team C collected 5 pounds
of trash.
The pan balance represents equality. Draw shapes on both sides of the
balance scale to represent the situation. Use a sphere to represent each
pound of known trash and a cube to represent the total weight of the
unknown trash.
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