Question 1113767
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<pre>
The extended square side length is  {{{sqrt(121)}}} = 11 inches.


Hence, the original square side length is 11-3 = 8 inches.
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<U>Be aware</U>:  &nbsp;&nbsp;the equation/equations of &nbsp;@josgarithmetic and his approach are &nbsp;&nbsp;<U>W R O N G</U>.