This Problem Set is a part of the Lesson 10, Unit 6, Grade 7. The purpose of this lesson is to practice solving equations and to notice that one of the two ways of solving may be more efficient depending on the numbers in the equation. Identify and correct errors in solution pathways for equations of the form, understand that there are two approaches to solving equations of the given form. Let's think about which way is easier when we solve equations with parentheses.