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2:09
Khan Academy
Sal Khan
Khan Academy
In this lesson, we learn how to solve simple equations with one unknown variable. To find the unknown, we remove extra numbers by doing the opposite operation on both sides of the equation. This keeps the equation balanced and helps us find the value of the unknown variable.
Sep 11, 2012
System of Equations by Substitution
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Solving Systems of Equations by Substitution | Steps & Examples
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