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15 August, 08:02

3x+4y=43 find the value of y when x equals 9

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Answers (2)
  1. 15 August, 08:15
    0
    4=y or y=4 because substitute x which is 9 and do the inverse all operation until y is left.
  2. 15 August, 08:21
    0
    To start take the equation and then plug in 9 for x

    3x+4y=43

    3 (9) + 4y=43

    27+4y=43

    Subtract 27 from each side to get all of the y's by themselves

    27+4y-27=43-27

    4y=16

    Divide by four to get the value of one y

    4y/4=16/4

    y=4
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