Mega-Gym costs a one-time $60 membership fee and then charges $70 per month, while Mega-er-Gym does not charge a membership fee but costs $90 per month. If you sign up for Mega-Gym, how many months is it until your cost os the same as Mega-er-Gym?

Answer:
3 months
Step-by-step explanation:
So 60 dollar down and 70 per month
130 (60+70)
200
270
now 90 per month but no down
90
180
270
So 3 months