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anonymous

  • one year ago

x-2y=13 9x-9y=36

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  1. pooja195
    • one year ago
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    Is there a specific question ?

  2. anonymous
    • one year ago
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    yes it says. Find the solution of this system of equations

  3. pooja195
    • one year ago
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    Oh ok :) do you know what the first step would be?

  4. anonymous
    • one year ago
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    No, I never got how to do these :( I feel stupid lol

  5. pooja195
    • one year ago
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    aww :( okie let me help are you familiar with the elimination method?

  6. anonymous
    • one year ago
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    Yes I am.

  7. pooja195
    • one year ago
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    ok so what would we multiply x-2y=13 by to cancel out the x ? HINT: Opposite numbers will cancel out.

  8. pooja195
    • one year ago
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    \[\huge~\rm~?(x-2y=13)\] whats the opposite of 9?

  9. anonymous
    • one year ago
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    -9

  10. pooja195
    • one year ago
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    Good! :) \[\huge~\rm~-9(x-2y=13)\] can you distribute the -9 to EVERYTHING in the parentheses please? :)

  11. anonymous
    • one year ago
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    yes hang on

  12. anonymous
    • one year ago
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    -9+18-117? lol is this right? I havent did these in a long time

  13. pooja195
    • one year ago
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    No we need to multiply -9*x=? -9*-2=? -9*13=?

  14. anonymous
    • one year ago
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    -9 18 -117/ i did that

  15. pooja195
    • one year ago
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    \[\huge~\rm~-9x+18y=-117\] \[\huge~\rm~~~~~~~9x-9y=36 \] do you see anything that can cancel?

  16. anonymous
    • one year ago
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    there all positives?

  17. anonymous
    • one year ago
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    oh ok

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