Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true.
Understand that solving an equation or inequality is to determine the set of values for which the equation holds. Also, learn how to test solutions to equations and inequalities. Conclude the lesson by giving your students this challenge.