This Instructional Activity is a part of the Lesson 4, Unit 4, Grade 8. Solve the linear equation. Choose "something" to add, subtract, multiply, or divide on both sides of the equation. Validate the use of the properties of equality by having students share their thoughts. Then, discuss the "best" choice for the first step in solving the equation with the points below. Be sure to remind students throughout this and the other examples that the goal is to get equal to a constant; therefore, the "best" choice is one that gets them to that goal most efficiently.