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20 October, 00:25

What does x represent?

15x-12y=13

30x+9y=4

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Answers (1)
  1. 20 October, 04:24
    0
    15x - 12y = 13 ⇒ 30x - 24y = 26

    30x + 9y = 4 ⇒ 30x + 9y = 4

    -15y = 22

    -15 - 15

    y = - 1.467

    30x + 9 (-1.467) = 4

    30x - 13.203 = 4

    + 13.203 + 13.203

    30x = 17.203

    30 30

    x = 0.57343

    (x, y) = (0.57343, - 1.467)
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