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Algebra Difficulty 3.0 AMC 10/12 Find the answer United Kingdom

A group of pirates (raiders, sailors and cabin boys) divided $200$ gold and $600$ silver coins between them. Each raider received $5$ gold and $10$ silver coins. Each sailor received $3$ gold and $8$ silver coins. Each cabin boy received $1$ gold and $6$ silver coins. How many pirates were there altogether?

(A) $50$ (B) $60$ (C) $72$ (D) $80$ (E) $90$

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