Hi everybody! can some one me? ! : ) 30 !

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

This is so hard and it’s for a test

Solve 17= -13 - 8x and show your work.