You are trying to decide which cell phone carrier to use. Verizon will charge you $100 for a new phone and $40/month for their plan. Sprint will provide a new phone for free, but will charge $60/month for their plan. Write a system of equations that will allow you to figure out when the prices of each plan will be the same (be sure to define what each variable represents) Solve the system of equations using the substitution method.
Verizon:40p+100=s
Sprint:60p=s
p=payment
s=same price
40p+100=60p
-40p -40p
20p=100
20 20
p=5
5 months payment and the prices will end up the same.