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College Algebra  /  Alg 159  ·  Atom · ~20 seconds

The Addition Property of Inequality

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The addition property of inequality says adding or subtracting the same number on both sides leaves the inequality's direction unchanged.

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x + 3 < 7 becomes x < 4 after subtracting 3 — and 0 satisfies both, while 5 satisfies neither.

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Direction is the thing being protected.

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