High School · Reasoning with Equations and Inequalities

CCSS.MATH.CONTENT.HSA.REI.A.1

Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.

Read this standard on the official Common Core site

Lessons that teach this standard

• Radical and Rational Equations, and Extraneous Solutions

  Why every solving step is a claim that follows from the one before, why squaring or clearing denominators can add false answers, and how to solve and check both kinds.