SpiritofVengence
SpiritofVengence SpiritofVengence
  • 01-04-2021
  • Mathematics
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Respuesta :

Аноним Аноним
  • 01-04-2021

Answer:

9

Step-by-step explanation:

plug -20 into x

-20+3y=7

solve

add 20 to both sides

3y=27

y=9

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