addition, subsitution, or subtraction: which would be most

[help_me_ please]

Which method (addition, subsitution, or subtraction) would be most conveniant to use to solve the following system:

3x-5y+3
4x+5y=4

and why?

 

[stapel]

The answer will, to a certain extent, be a matter of taste (something only you can decide), and is thus something only you can answer.

Eliz.

 

[Denis]

What do you get if you add the 2 equations together?