Y im hella boared bru. h

For how answer my question this will be the last question can you answer in math subject

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 expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

If i have 20$ and i gave 5$ away how much i got