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28 July, 18:36

4x+2y=20 and 3x-y=10

Which coordinate solves both equations.

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Answers (1)
  1. 28 July, 19:02
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    4x + 2y = 20

    3x - y = 10

    Multiplying second equation by 2.

    6x - 2y = 20

    Adding to the first,

    10x = 40

    x = 4

    y = 3x - 10 = 3 (4) - 10 = 2

    Answer: (4, 2)

    Check:

    4 (4) + 2 (2) = 16+4 = 20, good

    3 (4) - 2 = 12 - 2 = 10, good
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