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26 August, 16:33

What's is the answer to y=3x+7

Y=x-9

+2
Answers (1)
  1. 26 August, 18:21
    0
    ( - 8, - 17)

    Step-by-step explanation:

    Given the 2 equations

    y = 3x + 7 → (1)

    y = x - 9 → (2)

    Substitute y = 3x + 7 into (2)

    3x + 7 = x - 9 (subtract x from both sides)

    2x + 7 = - 9 (subtract 7 from both sides)

    2x = - 16 (divide both sides by 2)

    x = - 8

    Substitute x = - 8 into either of the 2 equations for corresponding value of y

    Substituting into (2)

    y = - 8 - 9 = - 17

    Solution is ( - 8, - 17)
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