Extraneous Solutions to Rational Equations

Solve a rational equation and ignore any extraneous solutions. Part of CC.HS.A-REI.2.
(Should maybe make it clear that there can be 1 or 2 solutions).

Based on this video: https://www.khanacademy.org/math/algebra/rational-expressions/rational_expressions/v/extraneous-solutions-to-rational-equations