Respuesta :

elpink25

Answer:  D. (7, 0)

Step-by-step explanation:

  1. [tex]4x+9y=28\\-4x-y=-28[/tex]
  2. The xs can already cancel since 4x is positive for the first equation, but negative on the second.
  3. Add the equations together
  4. 8y=0
  5. Divide both sides by 8
  6. y=0
  7. Plug y into one of the equations
  8. 4x + 9(0)=28
  9. Distribute 0
  10. 4x=28
  11. Divide both sides by 4
  12. x= 7

So your answer is (7, 0)