find all the possible values of y in 83y×y. also find each such number. (83ysquare)
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3 classes X,Y,Z take tests.The average score of X is 83,the average score of Y is 76,average score of Z is 85.The average score of X and Y is 79,the average score of Y and Z is 81.What is the average score of all 3 classes?
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