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1 October, 02:33

Solve the system of linear equations by elimination.

3x+2y=3

3x-2y=-9

What is x and what is y?

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Answers (2)
  1. 1 October, 03:33
    0
    3x+2y=3

    3x-2y=-9

    6x=-6

    x=-1

    3 (-1) + 2y=3

    -3+2y=3

    2y=6

    y=3
  2. 1 October, 05:40
    0
    ( - 1, 3)

    Step-by-step explanation:

    Given the 2 equations

    3x + 2y = 3 → (1)

    3x - 2y = - 9 → (2)

    Adding the 2 equations term by term will eliminate the term in y

    (3x + 3x) + (2y - 2y) = (3 - 9), that is

    6x = - 6 (divide both sides by 6)

    x = - 1

    Substitute x = - 1 in either of the 2 equations and solve for y

    Substituting in (1)

    3 ( - 1) + 2y = 3

    - 3 + 2y = 3 (add 3 to both sides)

    2y = 6 (divide both sides by 2)

    y = 3

    Solution is ( - 1, 3)
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