Question
The total length of a ribbon, a streamer and a thread is 51 m. The thread is 5 m longer than the ribbon. The streamer is 3 times as long as the ribbon. Find the difference in length between the streamer and the thread.
4 m

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The total length of a ribbon, a streamer and a thread is 51 m. The thread is 5 m longer than the ribbon. The streamer is 3 times as long as the ribbon. Find the difference in length between the streamer and the thread.