Hello there, and thank you for posting your question here on brainly.
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Answer: x = 256
Why?
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We all know that area is l * w = a (length times width equals area) So, we have to find what x is, square root it, and then multiply it by 7. The square root of 256 is 16. 16 * 7 is 112. So, 256 is the answer.
Hope this helped you! ♥
