It cost $100 to join a fitness program and $20 per month. Another programs start up fee is $160 and cost $15 per month to subscribe. Which is the best offer.

Answer 1

1st program costs C=100+20M

2nd costs C=160+15M

100+20M = 160+15M

5M =60

M=12 months

1st program is better if you do it for less than 12 months

2nd program is cheaper if you do it for more than 12 months

they cost the same if you do it for exactly 12 months