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Second Year maths · J.6 · Systems of equations

Solve a system by elimination: opposite coefficients

Use substitution or elimination so that you find x and y. Write your answer as (x, y).

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  1. Solve the system: 4x − 2y = 36 and −4x + 3y = −42. Write your answer as (x, y).

    Answer: (6, -6)

  2. Solve the system: 2x + 2y = 4 and −2x − y = −1. Write your answer as (x, y).

    Answer: (-1, 3)

  3. Solve the system: 3x + 4y = 34 and −3x − 3y = −30. Write your answer as (x, y).

    Answer: (6, 4)

Tip: Use substitution or elimination so that you find x and y. Write your answer as (x, y).

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