Marco has $38.43 dollars in his checking account. His checking account is linked to his amazon music account so he can buy music
. The songs he purchases cost $1.29. Part 1- write an algebraic expression to describe the amount of money in his checking account in relationship to the number of songs he purchased. Part 2- Describe what the variable represents in the situation
, you end up with the differentials 
. Multiplying both sides by 2 gives 
.
