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11 January, 21:43

First equation - 4x + 9 y equals 9 second equation x - 3y equals negative 6 use the elimination process all of it

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  1. 11 January, 22:00
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    -4x + 9y = 9 ... A

    x - 3y = - 6 ... B

    Multiply B by 4. This will delete 4x.

    -4x + 9y = 9

    4x - 12y = - 24

    -3y = - 15

    y = - 15/-3

    y = 5

    To find x, plug y = 5 into A or B.

    I will use A.

    -4x + 9y = 9

    -4x + 9 (5) = 9

    -4x + 45 = 9

    -4x = 9 - 45

    -4x = - 36

    x = - 36/-4

    x = 9

    Answer: x = 9, y = 5.
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