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17 September, 08:18

Use the elimination method to solve the system of equations. Choose the correct ordered pair.

- x + y = - 3

3x + 2y = 9

A. (3,0)

B. (6,3)

C. (5,2)

D. (4,1)

+3
Answers (2)
  1. 17 September, 08:50
    0
    Answer is a

    x=3+y

    3 * (3+y) + 2y=9

    9+3y+2y=9

    y=0

    x=3

    (3; 0)
  2. 17 September, 09:14
    0
    A. (3, 0).

    Step-by-step explanation:

    - x + y = - 3

    3x + 2y = 9 Multiply the first equation by - 2:

    2x - 2y = 6 Adding the last 2 equations to eliminate y:

    5x = 15

    x = 3.

    Substitute for x in the second equation:

    3 (3) + 2y = 9

    2y = 9 - 9 = 0

    y = 0.
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