Is the math self-consistent

 
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razer1
Formerly active
With us since: April 17th, 2008
Messages: 147
Place of residence: Austria
Topic start: 2009-01-28




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davidhigh
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With us since: 03/10/2007
Messages: 3057
Place of residence: Kiel
Contribution No.1, registered 2009-01-28




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razer1
Formerly active
With us since: 04/17/2008
Messages: 147
Place of residence: Austria
Post No.2, from the topic starter, entered 2009-01-29


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razer1 saw the answers to his / her question.
razer1 has ticked the OK box himself.