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April 28, 2015

Homework Help: math

Posted by anna on Wednesday, March 2, 2011 at 5:11pm.

Hitomi has a total of 30 red and blue bowling balls ate her bowling alley. Each red ball weighs 8 lb. Each blue ball weighs 9 lb. If the total mass of the blue balls is 49 lb. heavier than the total mass of the red balls, how many red balls does she have?

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