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30 August, 00:35

How do you solve this system by elimination?

-5x+7y=11

-5x+3y=19

I don't know how to solve it.

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Answers (1)
  1. 30 August, 01:32
    0
    (-5x+7y=11) - (-5x+3y=19) =

    4y = - 8. (divide both sides by 4)

    y = - 2

    Substitute

    -5x + 7 (-2) = 11

    -5x - 14 = 11

    -5x = 25

    x = - 5

    y = - 2 and x = - 5
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