cook2001 cook2001
  • 22-01-2020
  • Mathematics
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–7x +9y=-18
-2x – 9y = 18

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jenna0226
jenna0226 jenna0226
  • 22-01-2020
-7x+9y=-18
-2x-9y=18

-9x (y’s cancel)=0
X=0
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