Karon needs to choose between two gym plans. He can either pay a $150 joining fee and $10 per month, or he can pay a $50 joining fee and $30 per month. PART A: Write a system of equations to model the situation.

Gym 1: C =

Gym 2: C =

PART B: Solve the system to determine on what month the costs of the plans will be equal.

The plans will be equal in ___ months and it will cost $___