slighlty confused with understanding free variables
woud z be the free variable? if so why???
and heres an example i made up
what are the free variables? z and w?? why?
would this be a good stragety to follow
say u have x=y+z
y=z like in the first example....
cross out all the variables which have an x and a y, since they are definined.. and the reamining none crossed out terms are the free variables ?
thanks guys and gals