vmjrab
vmjrab vmjrab
  • 01-05-2020
  • Mathematics
contestada

Solve using elimination.

–9x + 9y = 18
–6x + 9y = –12

Respuesta :

broska675 broska675
  • 01-05-2020
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
Answer Link
ot292115
ot292115 ot292115
  • 01-05-2020
Answer:
x = -10 and y = -8
Answer Link

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