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20 September, 10:04

Y=4x+3

y=-2x-9

solve for substitution

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Answers (1)
  1. 20 September, 10:28
    0
    To solve this, we multiply the second equation by - 2:

    y = 4x + 3

    -2y = 4x + 18

    Subtract:

    y = 4x + 3

    - (-2y = 4x + 18)

    3y = 15

    y = 5

    Input this:

    5 = 4x + 3

    4x = 2

    x = 1/2

    (1/2, 5)
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