document.write( "Question 496174: if one side of a square is increased by 8 feet and an adjacent side is decreased by 2 feet a rectangle is formed whose perimeter is 40 feet. find the length of a side of the square \n" ); document.write( "
Algebra.Com's Answer #336397 by htmentor(1343)\"\" \"About 
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Let s = the length of a side of the square
\n" ); document.write( "The two new sides have length s + 8 and s - 2
\n" ); document.write( "The equation for the new perimeter is:
\n" ); document.write( "2(s+8) + 2(s-2) = 40
\n" ); document.write( "Solve for s:
\n" ); document.write( "2s + 16 + 2s - 4 = 40
\n" ); document.write( "4s = 28
\n" ); document.write( "s = 7
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