document.write( "Question 951557: the length of a rectangle is 3times its worth. if the perimeter is 72cm. calculate the width of the rectangle \n" ); document.write( "
Algebra.Com's Answer #581155 by macston(5194)\"\" \"About 
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W=width; L=length=3W P=perimeter=2(L+W)=72 cm
\n" ); document.write( "P=2(L+W) Substitute for L
\n" ); document.write( "72cm=2(3W+W)
\n" ); document.write( "72cm=8W divide each side by 8
\n" ); document.write( "9cm=W ANSWER The width of the rectangle is 9 cm.
\n" ); document.write( "CHECK:
\n" ); document.write( "L=3W=3(9cm)=27cm
\n" ); document.write( "P=2(L+W)
\n" ); document.write( "72cm=2(27cm+9cm)
\n" ); document.write( "72cm=2(36cm)
\n" ); document.write( "72cm=72cm
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