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15 August, 05:41

9x + 7y = - 12 find the value of y when x equals 1

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Answers (2)
  1. 15 August, 06:09
    0
    y = - 3

    Step-by-step explanation:

    9x + 7y = - 12

    Let x = 1

    9 (1) + 7y = - 12

    9 + 7y = - 12

    Subtract 9 from each side

    9 - 9 + 7y = - 12-9

    7y = - 21

    Divide each side by 7

    7y/7 = - 21/7

    y = - 3
  2. 15 August, 06:18
    0
    y = - 3

    Step-by-step explanation:

    9x + 7y = - 12

    9 (1) + 7y = - 12

    9 + 7y = - 12

    7y = - 12 - 9

    7y = - 21 (divide both sides by 7)

    y = - 3
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