anonymous
  • anonymous
x-2y=13 9x-9y=36
Mathematics
katieb
  • katieb
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pooja195
  • pooja195
Is there a specific question ?
anonymous
  • anonymous
yes it says. Find the solution of this system of equations
pooja195
  • pooja195
Oh ok :) do you know what the first step would be?

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anonymous
  • anonymous
No, I never got how to do these :( I feel stupid lol
pooja195
  • pooja195
aww :( okie let me help are you familiar with the elimination method?
anonymous
  • anonymous
Yes I am.
pooja195
  • pooja195
ok so what would we multiply x-2y=13 by to cancel out the x ? HINT: Opposite numbers will cancel out.
pooja195
  • pooja195
\[\huge~\rm~?(x-2y=13)\] whats the opposite of 9?
anonymous
  • anonymous
-9
pooja195
  • pooja195
Good! :) \[\huge~\rm~-9(x-2y=13)\] can you distribute the -9 to EVERYTHING in the parentheses please? :)
anonymous
  • anonymous
yes hang on
anonymous
  • anonymous
-9+18-117? lol is this right? I havent did these in a long time
pooja195
  • pooja195
No we need to multiply -9*x=? -9*-2=? -9*13=?
anonymous
  • anonymous
-9 18 -117/ i did that
pooja195
  • pooja195
\[\huge~\rm~-9x+18y=-117\] \[\huge~\rm~~~~~~~9x-9y=36 \] do you see anything that can cancel?
anonymous
  • anonymous
there all positives?
anonymous
  • anonymous
oh ok

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