Look at the revenue for videos rented (v) on a given day at two different video rental stores below
r = 2v + 10
r = 1.6v + 18
After how many video rentals will the revenues of both stores be equal?
a)25
b)45
c)70
d)20
d) 20; transitive property, so
2v + 10 = 1.6v + 18