The bank where hilary maintains her checking account mistakenly deducted $16 each month from her account for 8 months and $19 a month for the next 5 months. the bank realized and corrected the error after 13 months. how much money does the bank need to return hilary’s account?

The bank owes Hilary $223.
You can find the answer by multiplying $16 by 8, to find how much money the bank mistakenly charged Hilary for eight months.
Then, multiply $19 by 5, to find how much money the bank mistakenly charged Hilary for 5 months.
To find the total amount that the bank charged Hilary in the total 13 months, add the sums from both equations.
$16*8 = $128.
$19*5 = $95.
$128 + $95 = $223.