Learning goals: Teacher Facing Create expressions and equations to represent a linear relationship with two or more related quantities in context. Determine the solution to an equation of the form $px+q=r$ and explain (orally) the solution method. Interpret expressions, equations, and solutions that represent a linear relationship with two or more related quantities. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.9 Putting it All Together, Grade 7.