WEBVTT

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Here is the problem: negative 2x plus 7 equals negative 10.

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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 2.

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So the answer is x equals 17 over 2 approximately 8.5.

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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 8.5: left side equals negative 10, right side equals negative 10, which checks out.