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Lesson: Basic Algebra - 03

Isolating Variables

[Page 3 of 21]
The textbook method to solving these equations is to isolate the variable on one side of the equation by doing the same thing to both sides.
To isolate x in the following equation, we start by multiplying both sides by 3:

Then we add 6 to both sides:
Finally, we divide by two, and x is all alone on one side of the equation, which is exactly what we want:
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