document.write( "Question 128616: Suppose that the length of a rectangle is 3 inches longer than the width and that the perimeter of the rectangle is 78.\r
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document.write( "If the length measures 3 inches more than the width, and the width is w, then
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document.write( "the length is w + 3.  We know that the perimeter of a rectangle is given by
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document.write( ", so just substitute:\r
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document.write( " and we are given that \r
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document.write( "Distribute the 2 and remove the parentheses:
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document.write( "Collect like terms:
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document.write( "Add -6 to both sides:
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document.write( "And divide by 4:
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document.write( "The length is \r
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document.write( "Check:
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document.write( "2 times 21 is 42, 2 times 18 is 36, and 42 plus 36 is 78.  Answer checks.  \n" );
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