document.write( "Question 601676: The area of a rectangular slab of sidewalk is 45square feet. its length is 3 feet more than 4times the width. find the length and width.
\n" ); document.write( "I have 4w+3=L but i dont really know what to do.....
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Algebra.Com's Answer #379980 by Alan3354(69443)\"\" \"About 
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The area of a rectangular slab of sidewalk is 45square feet. its length is 3 feet more than 4times the width. find the length and width.
\n" ); document.write( "I have 4w+3=L but i dont really know what to do
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\n" ); document.write( "4w+3=L
\n" ); document.write( "L*W = 45
\n" ); document.write( "Sub for L
\n" ); document.write( "(4W+3)*W = 45
\n" ); document.write( "4W^2 + 3W - 45 = 0
\n" ); document.write( "(W - 3)*(4W + 15) = 0
\n" ); document.write( "W = 3
\n" ); document.write( "L = 15
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