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College Algebra  /  Alg 486  ·  Atom · ~20 seconds

The Addition Method

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The addition method adds the equations, scaled if needed, so one variable's terms cancel as opposites — leaving one equation in one unknown.

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2x + 3y = 12 stacked on 4x − 3y = 6: the y-terms are already opposites, and adding gives 6x = 18.

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