This Instructional Activity is a part of the Lesson 8, Unit 3, Grade 7. Have students present the models they created based upon the given relationships, and then have the class compare different correct models and/or discuss why the incorrect models were incorrect. The initial step to solve the equation algebraically is to collect all like terms on the left-hand side of the equation using the any order, any grouping property. The goal is to rewrite the equation into the form a number by making zeros and ones.