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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