Roscoe's family has dinner at a restaurant. The total cost is $103.80. This includes 5% tax and 15% tip on the ore tax amount. H
ow much was the bill before tax and tip?
1 answer:
Answer:
$86.50
Step-by-step explanation:
Let b represent the bill before tax and tip. Then the total is ...
b + 0.05b + 0.15b = 103.80
b(1.20) = 103.80 . . . . . . . . . . collect terms
b = 103.80/1.20 = 86.50 . . . divide by the coefficient of b
The bill before tax and tip was $86.50.
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