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7 August, 20:01

Solve each system by substitution

2x - 3y = - 1

X + 4y = - 6

+2
Answers (1)
  1. 7 August, 20:40
    0
    ( - 2, - 1)

    Step-by-step explanation:

    Given the 2 equations

    2x - 3y = - 1 → (1)

    x + 4y = - 6 → (2)

    Rearrange (2) expressing x in terms of y by subtracting 4y from both sides

    x = - 6 - 4y → (3)

    Substitute x = - 6 - 4y into (1)

    2 ( - 6 - 4y) - 3y = - 1 ← distribute and simplify left side

    - 12 - 8y - 3y = - 1

    - 12 - 11y = - 1 (add 12 to both sides)

    - 11y = 11 (divide both sides by - 11)

    y = - 1

    Substitute y = - 1 into (3) for corresponding value of x

    x = - 6 - 4 ( - 1) = - 6 + 4 = - 2

    Solution is ( - 2, - 1)
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