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I have a problem.... I have to express unknown "r" from from this equation:

$$Y\times r=(-Z\times 2r\times L)+(z\times K^2\times 0.5L)$$

Can someone help me ?

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closed as not a real question by Andrés E. Caicedo, Amzoti, Alexander Gruber, Start wearing purple, J. M. May 18 '13 at 6:09

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

This matematic is too hard – Harold May 15 '13 at 15:01
show some effort from your side – iostream007 May 15 '13 at 15:01
do you want find out value of r in terms of Y,Z,L,K? – iostream007 May 15 '13 at 15:02

Hint: move the term containing $r$ to the left by adding $2ZLr$ to both sides, then use the distributive law to write the left as (something)$r$, then divide both sides by (something)

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