you are trying to decide which cell phone plan to purchase. Plan A chargeres $40 for a new phone and $20 a month for usage. Plan B provides the phone for free, but has a fee of $30 a month for usage.

Plan B is a better phone plan

Step-by-step explanation:

Step 1-

Plan A-

$40 + $20x=y

x - months

y - total

$40 plus $20 per month would give you the total

Plan B-

$30x=y

x - months

y - total

For Plan B you pay $30 a month for the total and the phone is free so you don't add anything to it.

Step 2-

Substitute x for different values to see how much it would cost for the phone plan per month

Plan A-

40+20 (1) = 60

So for 1 month it is $60

40+20 (2) = 80

So for 2 months it's $80

Plan B-

30 (1) = 30

So for 1 month it would be $30

30 (2) = 60

So for 2 months it would be $60

Plan B would be the best plan because it is the cheapest and you get a free new phone

A because one time fees for a phone upgrade or initial phone are just one time. Look at the monthly fees instead would you rather pay more each month or less each month? If answer is less A is the best choice even though in the beginning you need to pay more.