document.write( "Question 911012: The formula for the perimeter P of a rectangle is P = 2l + 2w where l is the length and w is the width. Solve the formula for l and write the reason for each step. Then find the length of a rectangular lawn whose perimeter is 55 meters and whose width is 11 meters. Drawing a picture would be helpful here.
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Algebra.Com's Answer #552807 by josgarithmetic(39618)\"\" \"About 
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Drawing a picture would be helpful, as you say. Using better choices for variables is also a good idea, and in fact very important when using keyboard, computer input and characters. \r
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\n" ); document.write( "\n" ); document.write( "Your perimeter definition equation LOOKS like, the left member, P is equal to the right member described as the quantity twenty-one plus the term two times w. \r
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\n" ); document.write( "\n" ); document.write( "Use UPPER CASE L instead of the lower case L.
\n" ); document.write( "\"highlight_green%28P=2L%2B2w%29\".
\n" ); document.write( "Much easier to read.\r
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\n" ); document.write( "\n" ); document.write( "The drawing you want is difficult to code, but maybe a description will help you to make a drawing on paper:
\n" ); document.write( "Draw a rectangle. One pair of opposite sides is 11 meters, and you should label their lengths as such. The other pair of opposite sides are each L. Label them.\r
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\n" ); document.write( "\n" ); document.write( "You want to know L, but only are given P=55 and w=11. You will see how the data corresponds to your drawing.\r
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\n" ); document.write( "\n" ); document.write( "\"55=2L%2B2%2A11\", according to formula of perimeter and what the given values are. Solve for L.
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\n" ); document.write( "\"2L%2B22=55\", combined steps of simple computation and symmetric property of equality;
\n" ); document.write( "\"2L=55-22\", equivalent to addition property of equality, using additive inverse of 22;
\n" ); document.write( "\"2L=33\", simple computation;
\n" ); document.write( "\"highlight%28L=33%2F2%29\", Multiplicative Inverse property
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