This Problem Set is a part of the Lesson 5, Unit 6, Grade 7. Reasoning about Equations and Tape Diagrams (Part 2) Solve equations of the form using a tape diagram or by reasoning about the value that would make the equation true. Use tape diagrams to understand that there are situations that can be represented by an equation of the diven form. Let's use tape diagrams to help answer questions about situations where the equation has parentheses.