Learning goals: Teacher Facing Interpret and coordinate tape diagrams, equations, and verbal descriptions for situations involving signed numbers. Solve an equation of the form $px+q=r$ or $p(x+q)=r$ to determine an unknown quantity in a situation, and present the solution method (orally, in writing, and through other representations). Write an equation of the form $px+q=r$ or $p(x+q)=r$ to represent a situation involving signed numbers. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.6 Expressions, Equations, and Inequalities, Grade 7.