Big Ideas:
A solution is a number that makes an equation true.
Inverse operations can be helpful in finding a solution.
This lesson builds on solving for variables using solution sets by asking students to solve for variables without being given a solution set. In this task, students write and solve single-step addition and subtraction equations that represent a real-life situation and include a variable. Students may use inverse operations to determine solutions and justify their solutions using substitution in algebraic equations. This concept builds toward solving for variables in inequalities and two-step equations.
Special Materials:
none
Lesson plan