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Posted by **John Dosley** on Wednesday, November 27, 2013 at 9:09am.

- math -
**Jai**, Wednesday, November 27, 2013 at 10:22amLet n = number of laptops sold

5 / 9 = 20 / n

5n = 9 * 20

5n = 180

n = 36 laptops

- math -
**John Dosley**, Wednesday, November 27, 2013 at 10:27amthanks

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