document.write( "Question 601842: The width of a rectangular lawn is 3m less than half its length. The perimeter is 42m. Show that w+l=21. write an equation for the width and calculate the width of the lawn. \n" ); document.write( "
Algebra.Com's Answer #380040 by nerdybill(7384)\"\" \"About 
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The width of a rectangular lawn is 3m less than half its length. The perimeter is 42m. Show that w+l=21. write an equation for the width and calculate the width of the lawn.
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\n" ); document.write( "Let W = width
\n" ); document.write( "and L = length
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\n" ); document.write( "2(W+L) = 42
\n" ); document.write( "dividing both sides by 2 we get answer to first part:
\n" ); document.write( "W+L = 21
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\n" ); document.write( "From: \"width of a rectangular lawn is 3m less than half its length\" we get:
\n" ); document.write( "width = L/2 - 3
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\n" ); document.write( "Plug above into:
\n" ); document.write( "W+L = 21
\n" ); document.write( "L/2 - 3 +L = 21
\n" ); document.write( "L - 6 +2L = 42
\n" ); document.write( "-6 +3L = 42
\n" ); document.write( "3L = 48
\n" ); document.write( "L = 16m (length)
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\n" ); document.write( "calculating width:
\n" ); document.write( "width = L/2 - 3
\n" ); document.write( "width = 16/2 - 3
\n" ); document.write( "width = 8 - 3
\n" ); document.write( "width = 5m (width)\r
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