# Tim borrows $500 from Moby to buy a X-Box. He agrees to pay him back $15 every month. Write an equation to find the balance, B left after m months?

##### 1 Answer

Oct 5, 2017

Assuming Moby does not charge interest other than sharing the use of the X-box.

#### Explanation:

The amount to pay back

Each payment

Payment plan is:

where

Balance for any month is then:

So:

Then after 6 months,