Solve using elimination. –9x + 9y = 18 –6x + 9y = –12

Question

Solve using elimination.

–9x + 9y = 18
–6x + 9y = –12

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3 weeks 2021-11-13T20:39:44+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-11-13T20:41:27+00:00

    Answer:
    x = -10 and y = -8

    0
    2021-11-13T20:41:37+00:00

    you can multiply either the top or bottom equation by -1 so lets say you apply it to the bottom equation it’ll look like this:

    -9x + 9y = 18
    6x – 9y = 12

    then the +9y and -9y will cancel out

    -9x = 18
    6x =12

    then you add the two equations together

    -3x = 30

    divide both sides by -3

    x = -10

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