Find the Unknown Value by Adding Weights to a Scale.
In this activity, you are going to work with a scale balance by adding quantities to create equations and solve them. Just follow the instructions below.
Hint: Use for m, and for number.
Match equations Using Letters and Numbers.
Match Equations with Hangers.
In each case, find a solution to the equation, and use the hanger to explain what the solution means.
Explain your answer.
The system above is balanced. Andre says x is 7 because he can move the two 1s to the other side to add to 5. Do you agree with Andre? Explain your reasoning.
(1.) Write an equation to represent the hanger above.
(2.) Explain how to reason with the hanger to find the value of.
(3.) Explain how to reason with the equation to find the value of.