First one to get it right i will mark brainiest Subtract a-4 from 4a+16 and simplify your answer. The variable a should appear only once in your answer.

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.