ommears ommears
  • 09-02-2020
  • Mathematics
contestada

how do I solve for 7y-4x=42 x=5y+9

Respuesta :

harryxuanfu
harryxuanfu harryxuanfu
  • 09-02-2020

Answer:

x=-21  y=-6

Step-by-step explanation:

7y-4(5y+9)=42

7y-20y-36=42

-13y=78

y=-6

x=5*(-6)+9

x=-30+9

x=-21

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