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, b .(2 points)

1 answer

Let's start by setting up the equation.

The reduced bill can be determined by subtracting the cost of the dessert from the original bill, so the reduced bill is given by b - 12.

Now let's consider the tip. Since Stan tipped the waiter 20% on the reduced bill, the tip is 20% of (b - 12), which can be expressed as (0.2*(b - 12)).

According to the problem, the tip amounts to $15. Therefore, we can set up the equation:

0.2*(b - 12) = 15

Now we can solve this equation to determine the original bill, b.