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OpenStudy (anonymous):
chess rating;the formula r=rt-400[w-l]/n is used to establish establish a chess player's rating r after that player has played N games,won w of them and lost L of them.here r is the average rating of the opponents.solve for L.pls help me out with this last question for tonight and pls show working.
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OpenStudy (anonymous):
anyone there to help me
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