Completion requirements
This lecture series shows how you can apply the principle of doing the same thing to both sides of the equation to equations with variables on both sides. Watch the videos and complete the interactive exercise sets.
Why we do the same thing to both sides: Variable on both sides
Source: Khan Academy, https://www.khanacademy.org/math/algebra-home/alg-basic-eq-ineq#alg-variables-on-both-sides
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.