itisSheldon wrote:
A customer eats the lunch special at a restaurant and adds a tip of 15 percent to his bill. What was the total cost of the lunch, including the tip?
1) If the customer had left no tip, he would have paid $8.00 for the lunch.
2) The total cost of his lunch, including the tip, was 80 percent of the cost of the same meal at dinnertime, which is $11.50.
So if the customer's bill is $x, a tip of 15% of x = $0.15x is added. this makes total amount including the tip as = $1.15x. We need the value of
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