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1 December, 07:58

Solve the system of linear equations below.

x-3y=-3

x + 3y = 9

OA. x = - 12, y = 7

B. * = 3, y = 2

C. X = 6, y = 1

D. X = 6, y = 2

+3
Answers (1)
  1. 1 December, 08:05
    0
    x = 3, y = 2

    Step-by-step explanation:

    Given the 2 equations

    x - 3y = - 3 → (1)

    x + 3y = 9 → (2)

    Adding the 2 equations term by term eliminates the term in y, that is

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

    2x = 6 (divide both sides by 2)

    x = 3

    Substitute x = 3 into either of the 2 equations and solve for y

    Substituting x = 3 into (2)

    3 + 3y = 9 (subtract 3 from both sides)

    3y = 6 (divide both sides by 3)

    y = 2
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