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Mathematics, 29.06.2019 17:00 cexe468

Jill has 60 ribbons. half of them are red. the rest are blue and black. there are 4 more blue ribbons than black ribbons. how many black ribbons does jill have

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Jill has 60 ribbons. half of them are red. the rest are blue and black. there are 4 more blue ribbon...
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