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Substitution Method - Mathway
www.mathway.com › substitution-methodStep-by-Step Examples. Algebra. Systems of Equations. Solve by Substitution. x + 2y = 4 x + 2 y = 4 , x − y = −3 x - y = - 3. Subtract 2y 2 y from both sides of the equation. x = 4− 2y x = 4 - 2 y. x−y = −3 x - y = - 3. Replace all occurrences of x x with 4−2y 4 - 2 y in each equation.