document.write( "Question 718091: the area of a rectangular room is 84sq m. if the breath of the room is 5m less than its length, find the perimeter of the room \n" ); document.write( "
Algebra.Com's Answer #440740 by checkley79(3341)\"\" \"About 
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A=84=LW OR W=84/L
\n" ); document.write( "P=2L+2W
\n" ); document.write( "W=L-5
\n" ); document.write( "84/L=L-5
\n" ); document.write( "L(L-5)=84
\n" ); document.write( "L^2-5L-84=0
\n" ); document.write( "(L-12)(L+7)=0
\n" ); document.write( "L-12=0
\n" ); document.write( "L=12 ANS. FOR THE LENGTH.
\n" ); document.write( "W=84/712
\n" ); document.write( "W=7 ANS. FOR THE WIDTH.
\n" ); document.write( "PROOF:
\n" ); document.write( "84=7*12
\n" ); document.write( "84=84
\n" ); document.write( "P=2*7+2*12
\n" ); document.write( "P=14+24=38 ANS. FOR THE PERIMETER.\r
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