document.write( "Question 207161: Write a system of two equations in two unknowns. Solve the system by using the substitution method. « The length of a rectangular field is 12 feet longer than the width. If the perimeter is 144 feet, then what are the length and width \n" ); document.write( "
Algebra.Com's Answer #156605 by jojo14344(1513)\"\" \"About 
You can put this solution on YOUR website!

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\n" ); document.write( "First Equation:
\n" ); document.write( "\"L=12%2BW\", Length is 12 ft longer than the Width\r
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\n" ); document.write( "\n" ); document.write( "Second Equation:
\n" ); document.write( "\"P=2L%2B2W\"
\n" ); document.write( "\"144=2L%2B2W\"\r
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\n" ); document.write( "\n" ); document.write( "Substituting L in the 1st Eqn to the 2nd Eqn:
\n" ); document.write( "\"144=2%28blue%2812%2BW%29%29%2B2W\"
\n" ); document.write( "\"144=24%2B2W%2B2W\"
\n" ); document.write( "\"144-24=4W\" ---> \"120=4W\" ---> \"cross%28120%2930%2Fcross%284%29=cross%284%29W%2Fcross%284%29\"
\n" ); document.write( "\"highlight%28W=30ft%29\"\r
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\n" ); document.write( "\n" ); document.write( "Back in First Equation:
\n" ); document.write( "\"L=12%2B30\"
\n" ); document.write( "\"highlight%28L=42ft%29\"\r
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\n" ); document.write( "\n" ); document.write( "Check via Second Equation:
\n" ); document.write( "\"144=2%2842%29%2B2%2830%29\"
\n" ); document.write( "\"144=84%2B60\"
\n" ); document.write( "\"144ft=144ft\"\r
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\n" ); document.write( "\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo
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