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5 January, 19:30

5x-4y=-10 - 4x+5y=8

I need to know what x and y equal

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Answers (2)
  1. 5 January, 19:34
    0
    X would be 6, and y would be 5
  2. 5 January, 19:54
    0
    x = 6, y = 0

    Step-by-step explanation:

    Given the 2 equations

    5x - 4y = - 10 → (1) * 4

    - 4x + 5y = 8 → (2) * 5

    Multiplying (1) by 4 and (2) by 5 and adding will eliminate the term in x

    20x - 16y = - 40 → (3)

    - 20x + 25y = 40 → (4)

    Add (3) and (4) term by term

    9y = 0 ⇒ y = 0

    Substitute y = 0 in either of the 2 equations and evaluate for x

    Substituting y = 0 in (1)

    5x - 4 (0) = - 10, that is

    5x = - 10 (divide both sides by 5)

    x = - 2
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