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4 February, 22:01

2x + y = - 4

y = 3x + 2

A. (-6/5, - 8/5)

B. (-8/5, - 6/5)

C. (-6/5, - 11/5)

D. (-11/5, - 6/5)

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Answers (1)
  1. 4 February, 22:16
    0
    Y = 3x + 2 ... so we sub in 3x + 2 for y in the other equation

    2x + y = - 4

    2x + (3x + 2) = - 4

    5x + 2 = - 4

    5x = - 4 - 2

    5x = - 6

    x = - 6/5

    y = 3x + 2

    y = 3 (-6/5) + 2

    y = - 18/5 + 2

    y = - 18/5 + 10/5

    y = - 8/5

    solution is (-6/5, - 8/5)
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