A grocery store bought ice cream for $2.80 per half gallon and stored it in two freezers. During the night, one freezer malfunct
ioned and ruined 12 half gallons. If the remaining ice cream is sold for $3.96 per half gallon, how many half gallons did the store buy if they made a profit of $66.16?
Let's say that x is the number of days he tweets. Now, if he tweets any number of days, we can represent all of that with just x. So out expression will look like: