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December 21, 2014

December 21, 2014

Posted by **Tamaki** on Tuesday, November 12, 2013 at 1:33am.

- algebra -
**Jai**, Tuesday, November 12, 2013 at 3:49amLet n = cost of refreshments for 26 people.

We can do ratio and proportion here. For every 18 people, the cost of refreshments is $45, while for every 26 people, the cost of refreshments is $ n. Thus,

18 / 45 = 26 / n

We cross-multiply:

18n = 45 * 26

18n = 1170

Divide both sides by 18 to get n alone:

18n / 18 = 1170 / 18

n = $65

Hope this helps :3

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