document.write( "Question 216508: The length of a rectangle is 4cm longer than the width If the perimeter is 20cm, what is the area of the rectangle \n" ); document.write( "
Algebra.Com's Answer #163500 by drj(1380)\"\" \"About 
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The length of a rectangle is 4cm longer than the width If the perimeter is 20cm, what is the area of the rectangle\r
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\n" ); document.write( "\n" ); document.write( "Step 1. Let w be the width.\r
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\n" ); document.write( "\n" ); document.write( "Step 2. Let w+4 be the length\r
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\n" ); document.write( "\n" ); document.write( "Step 3. Perimeter P means adding up all 4 sides of the rectangle or \"P=w%2Bw%2Bw%2B4%2Bw%2B4=4w%2B8\".\r
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\n" ); document.write( "\n" ); document.write( "Step 4. Solving yields the following steps.\r
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\n" ); document.write( "\n" ); document.write( "\"P=4w%2B8=20\"\r
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\n" ); document.write( "\n" ); document.write( "Subtract 8 from both sides of equation\r
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\n" ); document.write( "\n" ); document.write( "\"4w%2B8-8=20-8\"\r
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\n" ); document.write( "\n" ); document.write( "\"4w=12\"\r
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\n" ); document.write( "\n" ); document.write( "Divide 4 to both sides of the equation\r
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\n" ); document.write( "\n" ); document.write( "\"4w%2F4=12\"\r
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\n" ); document.write( "\n" ); document.write( "\"w=3\" and \"w%2B4=7\"\r
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\n" ); document.write( "\n" ); document.write( "Check P=3+3+7+7=20...which is true statement.\r
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\n" ); document.write( "\n" ); document.write( "Step 5. Then, area = width * length = 3 * 7= 21 square centimeters.\r
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\n" ); document.write( "\n" ); document.write( "Step 6. ANSWER: The area is 21 square centimeters.\r
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\n" ); document.write( "\n" ); document.write( "I hope the above steps were helpful.\r
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\n" ); document.write( "\n" ); document.write( "For FREE Step-By-Step videos in Introduction to Algebra, please visit \r
\n" ); document.write( "\n" ); document.write( "http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry visit \r
\n" ); document.write( "\n" ); document.write( "http://www.FreedomUniversity.TV/courses/Trigonometry.\r
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\n" ); document.write( "\n" ); document.write( "Good luck in your studies!\r
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\n" ); document.write( "\n" ); document.write( "Respectfully,
\n" ); document.write( "Dr J
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