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16 January, 09:45

4x-2y=14

y=1/2x-1

Solve the system of linear equations by substitution. Check your answer.

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Answers (2)
  1. 16 January, 10:00
    0
    4x-2 (1/2x-1) = 14

    4x-x+2=14. 1=1/2 (4) - 1

    3x+2=14. 1=2-1

    3x=12. 1=1

    X=4

    Y=1/2 (4) - 1

    Y=2-1 Y=1
  2. 16 January, 10:12
    0
    4x - 2y = 14

    y = 0.5x - 1

    Get just one variable on one side for both equations.

    4x - 2y = 14 ⇒ 4x = 2y + 14 ⇒ 4x - 14 = 2y

    y = 0.5x - 1 ⇒ x - 2 = 2y

    Use the transitive property and then solve for x.

    x-2 = 4x-14

    12 = 3x

    x = 4

    Edit: Apprently I didn't use substitution. Oops! Sorry ...
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