I need help with this!

For the following system, use the second equation to make a subtitution for y in the first equation.
2x+y=6
y=3x+4
What is the resulting equation?
1) y+2x+y=6

2) 2x+y+3x+4=6

3) 2x+(3x+4)=6

Respuesta :

Answer:

1) -7/15 2) -19/15 3) 6=6

Step-by-step explanation:

i used cymath its an app

very useful