A. Write a variable equation that describes the problem situation. List all the parts as shown. Write the final equation, including the quantity the variable is representing, or
define a variable for the unknown if it is not given.

One cell phone plan charges $20 per month plus $0.15 per minute used. a second cell phone plan charges $35 per month plus $0.10 per minute used. write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.