document.write( "Question 189626: If the length of a rectangle is 2 km longer than twice the width, then what is the length if the area is 60 square kilometer? \n" ); document.write( "

Algebra.Com's Answer #142359 by jonvaliente(64) $\"\"$ $\"About$

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Let x=width of the rectangle
\n" ); document.write( "2x+2=length of the rectangle\r
\n" ); document.write( "\n" ); document.write( "If Area=length x width
\n" ); document.write( " $\"x%2A%282x%2B2%29=60\"$
\n" ); document.write( " $\"2x%5E2%2B2x=60\"$
\n" ); document.write( " $\"2x%5E2%2B2x-60=0\"$
\n" ); document.write( " $\"%282x%2B12%29%28x-5%29=0\"$
\n" ); document.write( "2x+12=0 and x-5=0
\n" ); document.write( "2x+12-12=0-12
\n" ); document.write( "2x=-12
\n" ); document.write( "x=-6, but the width cannot be negative\r
\n" ); document.write( "\n" ); document.write( "x-5=0
\n" ); document.write( "x-5+5=0+5
\n" ); document.write( "x=5, width is 5km\r
\n" ); document.write( "\n" ); document.write( "2(5)+2=12km\r
\n" ); document.write( "\n" ); document.write( "The length of the rectangle is 12km
\n" ); document.write( " \n" ); document.write( "

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