document.write( "Question 774755: a rectangles length is four times it's width, and the perimeter of the rectangle is 30. what is the length and width of this rectangle
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Algebra.Com's Answer #472436 by ananna(1)\"\" \"About 
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\"L=4W\" This is another way of saying that the length (L) is four times the width (W).\r
\n" ); document.write( "\n" ); document.write( "\"P=2%28L%2BW%29\" This is the formula for the perimeter of a rectangle (P is the perimeter).\r
\n" ); document.write( "\n" ); document.write( "\"30=2%28L%2BW%29\" Since we know the perimeter is 30, we can plug in 30 for P.\r
\n" ); document.write( "\n" ); document.write( "\"30=2%284W%2BW%29\" Now we can plug in 4W for L, since L=4W.\r
\n" ); document.write( "\n" ); document.write( "\"30=2%285W%29\" We can combine 4W and W to get 5W.\r
\n" ); document.write( "\n" ); document.write( "\"%2830%29%2F%282%29=%282%285W%29%29%2F%282%29\" To isolate W, we can divide both sides by 2.\r
\n" ); document.write( "\n" ); document.write( "\"%2815%29%2F%285%29=%285W%29%2F%285%29\" To further isolate W, divide both sides by 5.\r
\n" ); document.write( "\n" ); document.write( "\"3=W\" Now you know what W is.\r
\n" ); document.write( "\n" ); document.write( "\"L=4%2A3\" Plug in 3 for W to calculate L, since L=4W.\r
\n" ); document.write( "\n" ); document.write( "\"L=12\" Now you know both W and L.\r
\n" ); document.write( "\n" ); document.write( "So the length is 12 and the width is 3. Don't forget to include the units, like inches, feet, meters, etc. \r
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\n" ); document.write( "\n" ); document.write( "And that's all there is to it!!!\r
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