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I have this equation here that I need to solve for the variable 'r'. Normally this would be easy, but with the ceiling function I'm unsure of how to approach it.

$$0 = \frac{h}{w} - \frac{\lceil\frac{n}{r}\rceil\, y}{r\,x}$$

Thanks in advance for the help guys.

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    As your function is not one to one, the inverse is not unique.2011-05-05

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