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7 August, 11:06

Solve the system

x-0.25y=11750

-0.20x + y=10000

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Answers (1)
  1. 7 August, 11:25
    0
    X - 0.25y = 11,750 ⇒ x - 0.25y = 11,750

    -0.2x + y = 10,000 ⇒ 0.05x - 0.25y = - 2,500

    0.95x = 14,250

    0.95 0.95

    x = 15,000

    x - 0.25y = 11,750

    15,000 - 0.25y = 11,750

    - 15,000 - 15,000

    -0.25y = - 3250

    -0.25 - 0.25

    y = 13,000

    (x, y) = (15,000, 13,000)
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