Marion's dinner at a restaurant came to $32.40. this includes a 8% tax. marion wants to leave a 15% tip on the cost of the dinner alone. how much should she leave as a tip?

First let's find the cost of the dinner alone (without 8% sales tax) by solving the equation for x:

x + 0.08x = 32.40

1.08x = 32.40

x = 32.40/1.08

x = $30

Now calculate the 15% tip amount on the cost of the dinner alone:

(30)(0.15) = $4.50 (15% tip amount)