document.write( "Question 368332: A bill from Sam's Steakhouse was $18.40. We used a 20% discount coupon, but we also paid a 5% tax and 15% tip. We based the tip for the waitress on the full price of the dinner. How much was the actual cost of the dinner before discounts, tip, and tax? \n" ); document.write( "

Algebra.Com's Answer #262487 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "Let x represent the actual cost of the dinner.
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document.write( "Note: 20% off is the same as paying 80% of the actual cost
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document.write( "Am assuming here the coupon applied only to the cost of the meal.
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document.write( "Question states:
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document.write( ".80x + .05(.80x) + .15x = $18.40
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document.write( ".80x + .04x + .15x = 18.40
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document.write( "solve for x \n" );
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