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30-10-2018
Mathematics

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There is a sales tax of $20 on an item that costs $128 before tax. The sales tax on a second item is $6.75 . How much does the second item cost before tax?

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wegnerkolmp2741o wegnerkolmp2741o

30-10-2018

$20/128 = 6.75/x

using cross products

20x=128*6.75

divide by 20

x =43.20

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