Lesson 10

Different Options for Solving One Equation

Lesson Narrative

The purpose of this lesson is to practice solving equations of the form \(p(x+q)=r\), and to notice that one of the two ways of solving may be more efficient depending on the numbers in the equation.

Learning Goals

Teacher Facing

  • Critique (orally and in writing) a given solution method for an equation of the form $p(x+q)=r$.
  • Evaluate (orally) the usefulness of different approaches for solving a given equation of the form $p(x+q)=r$.
  • Recognize that there are two common approaches for solving an equation of the form $p(x+q)=r$, i.e., expanding using the distributive property or dividing each side by p.

Student Facing

Let’s think about which way is easier when we solve equations with parentheses.

Learning Targets

Student Facing

  • For an equation like $3(x+2)=15$, I can solve it in two different ways: by first dividing each side by 3, or by first rewriting $3(x+2)$ using the distributive property.
  • For equations with more than one way to solve, I can choose the easier way depending on the numbers in the equation.

CCSS Standards

Addressing

Building Towards