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# Re-arranging the Equation & Isolating a Variable.

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See attached file. The attached equation needs to be re-arranged such that the variable S is isolated (on the left side of the equation - eg: S=....).

##### Solution Summary

This shows how to rearrange an equation to isolate a given variable. The isolating variables are analyzed.

##### Solution Preview

To simplify problem, let:

  
--- = x , --- = y , --- = z
  

Therefore,

x z + y e [- (z + y) S]
Cr = 1 - ------- -----------------------
x + y z + y

x + y z + y e [- (z + y) S]
[1 - Cr] -------- = -------------------------
x z + ...

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