Question 1185695
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            There is no need to write and to solve any equation.


            This problem is arithmetic for the 4-th grade level students.




If the area of the square is  729 cm^2,  then its side is    {{{sqrt(729)}}} = 27  centimeters.


Since the frame is &nbsp;2 cm &nbsp;wide, &nbsp;the side of the square painting is  &nbsp;&nbsp;27 - 2 - 2 = 23 &nbsp;centimeters.      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>
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Solved and completed.



<H3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The instructions are ABSURDIST.</H3>