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15 August, 01:54

Zoe Paid $18.60 in sales tax and tips for her dinner the sales tax rate is 11% and she tipped 20%

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  1. 15 August, 02:16
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    The cost of the dinner before other costs is $14.20

    Step-by-step explanation:

    To solve this, we write the following equation:

    x +.11x +.20x = 18.60

    This is because in addition to paying for the dinner (x), she also has to pay 11% of it and another 20% of it. Now we can combine like terms and solve.

    1.31x = 18.60

    x = 14.20
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