Diners frequently add a 15% tip when charging a meal to a credit card. what is the price of the meal without the tip if the amount charged is $31.05? how much was the tip?

To answer this question you can set up an equation that represents the total amount of the bill plus the tip.

115%x = $31.05 (where x is the amount before the tip)

1.15x = 31.05; divide both sides
by 1.15
x =$27

$31.05 - $27 = $4.05

The price of the meal was $27, and the tip was $4.05 .

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