WEBVTT

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Here is the problem: 3x minus 18 equals 16.

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A linear equation in x: isolate x using inverse operations.

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Start with the equation.

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Add 18 to both sides.

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Divide both sides by 3.

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So the answer is x equals 34 over 3 approximately 11.333333.

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Doing the same operation to both sides keeps the equation balanced. Undoing addition, then multiplication, leaves x alone.

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x equals 11.333333: left side equals 16, right side equals 16, which checks out.