document.write( "Question 58172: The length of a rectangle is 2 centimeters less than three times its width.If the area is 40 square centimeters,find the length and width. \n" ); document.write( "
Algebra.Com's Answer #39826 by checkley71(8403)\"\" \"About 
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L=3W-2
\n" ); document.write( "L*W=40
\n" ); document.write( "(3W-2)W=40
\n" ); document.write( "3W^2-2W-40=0
\n" ); document.write( "(3W+10)(W-4)=0
\n" ); document.write( "3W+10=0
\n" ); document.write( "3W=10
\n" ); document.write( "W=-10/3 NOT A SOLUTION
\n" ); document.write( "W-4=0
\n" ); document.write( "W=4
\n" ); document.write( "L=3*4-2
\n" ); document.write( "L=12-2
\n" ); document.write( "L=10
\n" ); document.write( "PROOF
\n" ); document.write( "10*4=40
\n" ); document.write( "40=40
\n" ); document.write( "
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