Respuesta :

-y+4x=19

I think that's it but I'm not sure

Answer:

2x-y=20 I hope this is right!

Step-by-step explanation:

2*x

=2x

2*4

=8

y=2x-8(2)

y=2x-16-3

y=2x-20

20+y=2x

-y       -y

20=2x-y