Question
The length of a thread is 26 m longer than a wire. The length of a string is 12 m shorter than the thread. The total length of the thread, the string and the wire is 91 m. What is the length of the thread?
4 m

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The length of a thread is 26 m longer than a wire. The length of a string is 12 m shorter than the thread. The total length of the thread, the string and the wire is 91 m. What is the length of the thread?