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22 July, 15:39

Use substitution to solve the system of equations.

3x + 2y = 2

y = x - 9

(4, - 5)

(-5, 4)

(4, 13)

(20, 11)

+4
Answers (1)
  1. 22 July, 15:53
    0
    (4,-5)

    Step-by-step explanation:

    You can use substitution to substitute the answer options in for x and y or substitute an equation in to find each variable.

    Substitute an equation is the traditional method and will allow you to solve without any answer options.

    1. Substitute y=x - 9 into 3x+2y=2.

    3x+2 (x-9) = 2

    3x+2x-18=2

    5x-18=2

    5x=20

    x=4

    2. Substitute x=4 into y=x-9.

    y = 4-9

    y=-5

    (4,-5) is the solution.
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