Stan took Lily to his friend’s restaurant on a date. The friend told the waiter to remove the $12 dessert from Stan’s bill. Stan tipped the waiter 20% on the reduced bill, which was a $15 tip. Fill in the blanks to write an equation that will determine the amount of the original bill,

Answer 1

Let x be the amount of the original bill.

After the dessert was removed, the reduced bill was x - 12.

Stan tipped the waiter 20% on the reduced bill, which is 0.2(x - 12).

Therefore, the equation is: x - 12 + 0.2(x - 12) = x - 12 + 0.2x - 2.4 = x - 2.4 + 0.2x = 15.