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GRE Algebra (Numerical Entry) http://www.800score.com/forum/viewtopic.php?f=12&t=3362 
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Author:  Gennadiy [ Wed Apr 04, 2012 3:26 pm ] 
Post subject:  GRE Algebra (Numerical Entry) 
If (12 – z) = (2z – 12), then z = The correct answer is 8. To solve for z, first add z to both sides of the equation, getting 12 = 3z – 12. Next, add 12 to both sides to get 3z = 24. Now, divide both sides by 3 to get z = 8. 
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