businessarrow36 businessarrow36
  • 11-01-2021
  • Mathematics
contestada

-7y+10x=140
7y+7x=-21
Solve for y

Respuesta :

odunn
odunn odunn
  • 11-01-2021

Answer:

-10

Step-by-step explanation:

add these two equations together to get rid of y. This gives you

x = 7

then plug x back into either equation and you can solve for y !

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