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1 January, 18:34

Solve the following system of equations: - 2x + y = 1 - 4x + y = - 1

a. (3, 1)

b. (-1, 3)

c. (-1, - 3)

d. (1, 3)

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Answers (1)
  1. 1 January, 18:36
    0
    With Elimination system:

    Substract - 4x + y = - 1 with - 2x + y = 1

    and ... the result: 2x = 2, so x = 1

    Subtitution: - 2x + y = 1

    ⇔-2. 1 + y = 1

    ⇔ - 2 + y = 1

    ⇔y = 3

    The final answer is D (1, 3)
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