Tarnisa bought 4 sandwiches for her and her three friends. She had a coupon for $2 off each sandwich and spent a total of $18. If s represents the cost of each sandwich, how much did Tarnisa spend on each sandwich?
i think the answer is 4.5 because the $2 dollars off aren't needed to find how much she spent on each sandwich then divide the total amount spent by the number of sandwich bought which means 18/4= 4.5