anonymous
  • anonymous
what is the solution to the following system? -3x-2y=-12 9x+6y=-9 choices A.(2,1) B.no solution C.(-2,-1) D.infinitely many solutions
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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zpupster
  • zpupster
go ahead kadin use what learned earlier, pick substitution or elimination
anonymous
  • anonymous
pick eihter one?
zpupster
  • zpupster
sure they both work it just asks for a solution

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anonymous
  • anonymous
okay ill go with elimination
zpupster
  • zpupster
good choice
zpupster
  • zpupster
what can you mult the first eqaution by to get rid of x
anonymous
  • anonymous
by six right? because that would give me 18 and 9 times 2 is 18?
zpupster
  • zpupster
-3x - 2y = -12 9x + 6y = -9
zpupster
  • zpupster
i was thinking 3 that would give -9 and 9 when added they cancel
anonymous
  • anonymous
okay that makes more sense
anonymous
  • anonymous
-9x - 2y = -12 9x + 6y = -9
zpupster
  • zpupster
no you have to mult every term by 3 also -2y and -12
anonymous
  • anonymous
oh so -9x-6y=36
zpupster
  • zpupster
yes now add the equations together
anonymous
  • anonymous
do i do it by like terms?
zpupster
  • zpupster
yes
anonymous
  • anonymous
0x 0y = 27
zpupster
  • zpupster
yes it is safe to say no solutions can be found
anonymous
  • anonymous
okay im starting to understand these much better would you like to help me with another one just to be sure?
zpupster
  • zpupster
sorry lunch time, you can message i may be bck later today. remember to do your checks if the checks do not work you did something wrong.
anonymous
  • anonymous
alright thanks!!

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