document.write( "Question 764753: The length of a rectangle is 6 centimeters less than twice its width. The perimeter of the rectangle is 30 centimeters. What are the dimensions of the rectangle? \r
\n" ); document.write( "\n" ); document.write( "Its a multiple choice question.\r
\n" ); document.write( "\n" ); document.write( "A. length= 5 cm; width= 10 cm B. length= 12 cm; width= 9 cm \r
\n" ); document.write( "\n" ); document.write( "C. length= 8 cm; width= 7 cm D. length= 7 cm; width= 8 cm
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Algebra.Com's Answer #465703 by MathLover1(20849)\"\" \"About 
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\n" ); document.write( "given:\r
\n" ); document.write( "\n" ); document.write( "The length of a rectangle is \"6cm\" \"less\" than \"twice\" its width:\r
\n" ); document.write( "\n" ); document.write( "then we have \"length+%2B6cm=2%2Awidth\"........eq.1\r
\n" ); document.write( "\n" ); document.write( "the perimeter of the rectangle is \"30cm\":\r
\n" ); document.write( "\n" ); document.write( "\"P=2%2Alength%2B2%2Awidth\"\r
\n" ); document.write( "\n" ); document.write( "if \"P=30cm\", then \"2%2Alength%2B2%2Awidth=30cm\" .....eq.2\r
\n" ); document.write( "\n" ); document.write( "now substitute \"2%2Awidth\" from eq.1 in eq.2\r
\n" ); document.write( "\n" ); document.write( "\"2%2Alength%2B%28length+%2B6cm%29=30cm\"......solve for \"length\"\r
\n" ); document.write( "\n" ); document.write( "\"3%2Alength+=30cm-6cm\"\r
\n" ); document.write( "\n" ); document.write( "\"3%2Alength+=24cm\"\r
\n" ); document.write( "\n" ); document.write( "\"length+=24cm%2F3\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28length+=8cm%29\"\r
\n" ); document.write( "\n" ); document.write( "now go back to eq.1 and find the \"width\"\r
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\n" ); document.write( "\n" ); document.write( "\"length+%2B6cm=2%2Awidth\"........eq.1......plug in \"length\"\r
\n" ); document.write( "\n" ); document.write( "\"8cm%2B6cm=2%2Awidth\"\r
\n" ); document.write( "\n" ); document.write( "\"14cm=2%2Awidth\"\r
\n" ); document.write( "\n" ); document.write( "\"width=14cm%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28width=7cm%29\"\r
\n" ); document.write( "\n" ); document.write( "so, your answer is C. \"length=+8cm\"; \"width=+7cm\" \r
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