Question
The length of a ribbon is 31 m longer than a wire. The length of a thread is 27 m shorter than the ribbon. The total length of the ribbon, the thread and the wire is 74 m. What is the length of the ribbon?
4 m

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The length of a ribbon is 31 m longer than a wire. The length of a thread is 27 m shorter than the ribbon. The total length of the ribbon, the thread and the wire is 74 m. What is the length of the ribbon?