Question
Packet D is one-fifth as heavy as Packet E. Packet F is 2 times as heavy as Packets D and E together. What is the mass of Packet F if Packet E is b kg?
2 m

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Packet D is one-fifth as heavy as Packet E. Packet F is 2 times as heavy as Packets D and E together. What is the mass of Packet F if Packet E is b kg?