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You add or subtract some quantity on both sides of the equation, so that you only have "x" on one side of the equation. Example:

4x + 3 = 2x - 5

Subtract 2x on each side, this leaves you:

4x - 2x + 3 = 2x - 2x -5

2x + 3 = -5

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Q: How do you solve for x on both sides of the equation?
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