SOLUTION: I am wondering what if an equation had three variables, how would you solve and graph it? Does it change the graph?

You can put this solution on YOUR website!
Three variables implies the need for a three-dimensional
graphing system (x,y,z).
In general you would need three equations to find the
value of the three variables.
Using Google you can find many examples of "systems of
three linear equations".
---------------
Cheers,
Stan H.