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posted by sarah Monday, September 10, 2012 at 12:25am.
pencils come in packs of 20 for 2.79 if 18 8th graders and 19 7th graders need 4 pencils how much would it cost?
total students: 18+19 = 37 packs needed for 37 pencils: 37/20 or two packs cost: 2*2.79 = 5.58
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