document.write( "Question 1060743: A rectangle has an area of 180 cm^2. When the length and the width are shortened by 1 cm each, the area is reduced by 27 cm^2. Find the new perimeter. \n" ); document.write( "
Algebra.Com's Answer #675617 by Boreal(15235)\"\" \"About 
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sides are x and y
\n" ); document.write( "xy=180
\n" ); document.write( "(x-1)(y-1)=153.
\n" ); document.write( "xy-y-x+1=153
\n" ); document.write( "180-y-x+1=153
\n" ); document.write( "-x-y+1=-27
\n" ); document.write( "x+y-1=27
\n" ); document.write( "x+y=28
\n" ); document.write( "but x=180/y
\n" ); document.write( "so 180/y +y=28
\n" ); document.write( "multiply by y
\n" ); document.write( "180+y^2=28y
\n" ); document.write( "y^2-28y+180=0
\n" ); document.write( "(x-18)(x-10)=0
\n" ); document.write( "x=18, 10
\n" ); document.write( "if x=18, y=10
\n" ); document.write( "shorten each by 1 cm and 17+9=153 or 27 cm^2 less.
\n" ); document.write( "But the perimeter is desired, and that would be 26*2=52 cm., twice 17 plus twice 9.
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