Question

To skate at Roller Heaven, each person must pay a membership fee (m) and a fee for each session (f). Art attended 5 sessions and paid $25 in all. Later, when he had attended 10 sessions, he paid $40 in all. How much is the membership fee and how much are the sessions.
Write the solution as an ordered pair.

Answer 1

25=m+5f
40=m+10f

Answer 2

then 40-10f=m
sub into other eqn

Answer 3

25=(40-10f)+5f
25=40-5f
-15=-5f
3=f