Exactly Three-Quarters

Weekly Problem 30 - 2007
Three-quarters of the area of the rectangle has been shaded. What is the length of x?
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Problem

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Exactly Three-Quarters


Three-quarters of the area of the rectangle has been shaded.

What is the length of $x$?



 

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