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'Weekly Problem 30 - 2007' printed from http://nrich.maths.org/

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Three-quarters of the area of the rectangle has been shaded.
What is the length of $x$?
Puzzling rectangle

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

 

 


 

This problem is taken from the UKMT Mathematical Challenges.

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