kamryn15 kamryn15
  • 09-10-2018
  • Mathematics
contestada

How to work this out ?

How to work this out class=

Respuesta :

altavistard
altavistard altavistard
  • 14-10-2018

Answer:

The solution is (-3, -2).

Step-by-step explanation:

Please note that if you simply add these 2 equations together, 9x - 9x = 0, and you are then left with -5y = 10.  Thus, y = -2.  Subbing -2 for y in the first equation, we get 9x - 8(-2) = -11, or 9x + 16 = -11.

Subtracting 16 from both sides, we get 9x = -27, so that x = -3.

The solution is (-3, -2).


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