To answer this problem, we need to make a system of equations.
C= cost (in place of y in typical equation)
t= number of times renting boat (in place of x in typical equation)
Members- C=9.5t+105
Non-Members- C=14.75t
You can set them equal to each other because of transitive property.
9.5t+105=14.75t
Subtract 9.5t both sides
105=5.25t
Divide 5.25 on both sides
t=20
So it takes 20 times to rent a boat and have the same cost.
:)