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22 December, 14:52

Solve using elimination.

10x + 6y = - 2

2x + 6y = - 10

+1
Answers (1)
  1. 22 December, 16:15
    0
    (1, - 2)

    Step-by-step explanation:

    Given the 2 equations

    10x + 6y = - 2 → (1)

    2x + 6y = - 10 → (2)

    Multiplying (2) by - 1 and adding to (1) will eliminate the y - term

    - 2x - 6y = 10 → (3)

    Add (1) and (3) term by term

    (10x - 2x) + (6y - 6y) = ( - 2 + 10), that is

    8x = 8 (divide both sides by 8)

    x = 1

    Substitute x = 1 into either of the 2 equations.

    Substituting x = 1 into (1)

    10 (1) + 6y = - 2

    10 + 6y = - 2 (subtract 10 from both sides)

    6y = - 12 (divide both sides by 6)

    y = - 2

    Solution is (1, - 2)
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