document.write( "Question 244830: finding the depth of a rectangle with p=500ft and width=104ft what is the formula? \n" ); document.write( "
Algebra.Com's Answer #179000 by dabanfield(803)\"\" \"About 
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Perimeter (P) of a rectangle is the sum of the two width sides (W) plus the sum of the two depth sides (D).\r
\n" ); document.write( "\n" ); document.write( "That is: P = W+W+L+L = (2*W) + (2*D)\r
\n" ); document.write( "\n" ); document.write( "Substituting for P and W we have: 500 = (2*104) + 2*D
\n" ); document.write( "Simplifying we have: 500 = 208 + 2*D
\n" ); document.write( "Subtract 208 from both sides of the equation we have: 292 = 2*D
\n" ); document.write( "Dividing both sides of the equaation by 2 we have: 146 = D\r
\n" ); document.write( "\n" ); document.write( "In general:\r
\n" ); document.write( "\n" ); document.write( "P = (2+W) + (2*D)
\n" ); document.write( "P-(2*W) = 2*D
\n" ); document.write( "(P-(2*W))/2 = D
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