document.write( "Question 828210: Please help me solve this problem: ABCD is a rectangle.If the perimeter is 84 cm and AB is 6 cm longer than BC, find AD. \n" ); document.write( "
Algebra.Com's Answer #499146 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Easier to do in purely algebraic, arithmetic symbolism.\r
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\n" ); document.write( "\n" ); document.write( "x = AB = CD = y+6
\n" ); document.write( "y = BC = DA = unknown\r
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\n" ); document.write( "\n" ); document.write( "Perimeter is given, so \"2x%2B2y=84\"
\n" ); document.write( "\"x%2By=42\"
\n" ); document.write( "\"y=42-x\"
\n" ); document.write( "\"+y=42-%28y%2B6%29\"
\n" ); document.write( "\"y=42-y-6\"
\n" ); document.write( "\"y=38-y\"
\n" ); document.write( "\"2y=38\"
\n" ); document.write( "\"highlight%28y=19%29\"
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