document.write( "Question 60671This question is from textbook Essential Algebra
\n" ); document.write( ": Hi, I am a distance education student and new to geometry. I do not get it. Every other math sight I have found only tell you the answer but not how they got it. Thanks, Lee Ann \r
\n" ); document.write( "\n" ); document.write( "Problem: The Width of a rectangle is three feet less than its length. Find the length of the rectangle if its perimeter is 78 feet.
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Algebra.Com's Answer #41632 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
PERIMETER=2*LENGTH+2WIDTH
\n" ); document.write( "78=2*L+2(L-3)
\n" ); document.write( "78=2L+2L-6
\n" ); document.write( "78=4L-6
\n" ); document.write( "4L=78+6
\n" ); document.write( "4L=84
\n" ); document.write( "L=84/4
\n" ); document.write( "L=21 THEN THE WIDTH=21-3=18
\n" ); document.write( "PROOF
\n" ); document.write( "78=2*21+2*18
\n" ); document.write( "78=42+36
\n" ); document.write( "78=78
\n" ); document.write( "SUGGESTION: WHEN YOU WORK WORD PROBLEMS, IF POSSIBLE, DRAW A PICTURE, SKETCH OR DIAGRAM AND LABEL ALL RELEVENT FACTS, MEASUREMENTS, ANGLES, ETC.
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