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30-05-2017
Mathematics

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Tonya went out to a restaurant for lunch. She tipped 12% of her bill, which brought the sum of the lunch bill plus the tip to $28.

How much was the original bill?

Respuesta :

30-05-2017

tip = 12% × bill

$28 = tip + bill

$28 = bill + 12% × bill
$28 = bill (1 + 12%)

bill = $28÷(1+12%) = $25

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