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Author Message   Vkishore Pilla Bewarse Username: Vkishore Post Number: 982 Registered: 10-2011 Posted From: 149.199.62.254 Rating: N/A Votes: 0 Posted on Friday, April 25, 2014 - 3:59 pm:    Also this is not permutations and combinations. 4 unknowns equation . 4th grader ki advanced methods cheppalemu kabatti we use trial and substitution method which is still valid. Equation ni satisfy cheyyataniki certain assumptions teesukoni try chestamu ...and then figure out the rest. Link lo detail ga vundi .