Learning goals: Teacher Facing Categorize equations of the forms $px+q=r$ and $p(x+q)=r$, and describe (orally) the categories. Interpret a verbal description of a situation (in written language), and write an equation of the form $px+q=r$ or $p(x+q)=r$ to represent it. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.6 Expressions, Equations, and Inequalities, Grade 7.