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19 January, 18:35

Which choice is a solution to the system of equations?

y=2x-3

y-9=-x

A (-3,12)

B (4,5)

C (5,4)

D (12,-3)

+1
Answers (2)
  1. 19 January, 19:40
    0
    The answer to these question is B
  2. 19 January, 22:20
    0
    B

    Step-by-step explanation:

    Given the 2 equations

    y = 2x - 3 → (1)

    y - 9 = - x → (2)

    Substitute y = 2x - 3 into (2)

    2x - 3 - 9 = - x

    2x - 12 = - x (add x to both sides)

    3x - 12 = 0 (add 12 to both sides)

    3x = 12 (divide both sides by 3)

    x = 4

    Substitute x = 4 into either of the 2 equations and evaluate for y

    Substituting into (1)

    y = 2 (4) - 3 = 8 - 3 = 5

    Solution is (4, 5) → B
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