SOLUTION: The Sheng family had dinner at their favorite restaurant. A 10% sales tax was added to their bill. amy paid the bill with a $20 gift certificate plus $23.5. How much did the family

Algebra ->  Systems-of-equations -> SOLUTION: The Sheng family had dinner at their favorite restaurant. A 10% sales tax was added to their bill. amy paid the bill with a $20 gift certificate plus $23.5. How much did the family      Log On


   

Question 347738: The Sheng family had dinner at their favorite restaurant. A 10% sales tax was added to their bill. amy paid the bill with a $20 gift certificate plus $23.5. How much did the family's dinner cost before tax? Round your answer to the nearest penny.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let b = bill before tax
b+%2B+.1b+=+20+%2B+23.5
1.1b+=+43.5
b+=+39.54 is the cost before tax