This Instructional Activity is a part of the Lesson 5, Unit 4, Grade 8. Solve the following problem: One angle is five degrees less than three times the measure of another angle. Together, the angle measures have a sum of 143 degrees. What is the measure of each angle? Provide students with time to make sense of the problem and persevere in solving it. They could begin their work by guessing and checking, drawing a diagram, or other methods as appropriate.