ilovecandy1
ilovecandy1 ilovecandy1
  • 16-01-2017
  • Mathematics
contestada

Solve using elimination

-8x - 7y = 7
-9x - 7y = 14

Respuesta :

narwhalslippers
narwhalslippers narwhalslippers
  • 16-01-2017
x=-7 is what I got :/.
Answer Link
doodle10 doodle10
  • 16-01-2017
-9x - (-8x-7) = 14
-9x +8x +7 = 14
-x + 7 = 14
7 = 14 + x
X = - 7

(-8 x - 7) - 7y = 7
56 - 7y = 7
56-7 = 7y
49 = 7y
7 = y

Answer x=-7 and y=7
Answer Link

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