Find the equation of the line through (2,-1) parallel to the line 3x + y = 7

This section has got me all confused, What I got tried to do was:

3x = 7 + y

x = 7/3 + y/3

y - 1 = 7/3 (x-2)

3(y - 1) = 7 (x-2)

3y - 3 = 7x - 14

-7x + 3y = -14 + 3

7x - 3y = 14 - 3

7x - 3y = 11

3x + y = 5 is the right answer I just don't what what the hell is going wrong, probably got it all messed up.