Asked by anna

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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Answered by Ms. Sue
http://www.jiskha.com/display.cgi?id=1299027587
Answered by Habib
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