WEBVTT

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Here is the problem: negative 7x plus 7 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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Subtract 7 from both sides.

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Divide both sides by negative 7.

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So the answer is x equals negative 9 over 7 approximately negative 1.2857143.

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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 negative 1.2857143: left side equals 16, right side equals 16, which checks out.