SOLUTION: A music system has been on sale, with 20% off. On top of that, you have a special coupon, which gives you an additional rebate of 10%. The sales tax is 10%. In total, you ended up

Question 1139223: A music system has been on sale, with 20% off. On top of that, you have a special coupon, which gives you an additional rebate of 10%. The sales tax is 10%. In total, you ended up in paying $792. What was the original price of the music system?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
original price is x
sale price is 0.8x
after the 10% rebate on the 0.8x is 0.72x
The sales tax is 10% of 0.72 or 0.072x, added to the price to make 0.792x
.792x=$792
original price was $1000.
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