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27 June, 07:58

Solve this by substitution

Y=2x-9

X+3y=8

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Answers (1)
  1. 27 June, 11:31
    0
    Y = 2x - 9

    x + 3y = 8

    x + 3 (2x - 9) = 8

    x + 3 (2x) - 3 (9) = 8

    x + 6x - 27 = 8

    7x - 27 = 8

    + 27 + 27

    7x = 35

    7 7

    x = 5

    y = 2x - 9

    y = 2 (5) - 9

    y = 10 - 9

    y = 1

    (x, y) = (5, 1)
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