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15 April, 05:11

If x-2y=0 and 3x+y=7 whats the vaule of * ?

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Answers (1)
  1. 15 April, 05:38
    0
    The first equation may be written

    x = 2y

    The second equation is

    3x + y = 7

    Substituting

    3 (2y) + y = 7

    6y + y = 7

    7y = 7

    y = 1

    x = 2y = 2

    Answer: 2
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