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9 February, 10:15

What is the answer?

xy = 30

and x + y = 18

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Answers (1)
  1. 9 February, 10:17
    0
    from second equation y = 18-x so:-

    x (18 - x) = 30

    x^2 - 18x + 30 = 0

    x = 16.14, 1.86

    when x = 16.14 y = 18-16.14 = 1.86

    when x = 1.86, y = 16.14

    so one variable = 16.14 and the other = 1.86 Answer
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