document.write( "Question 184014: the length of a crayon box base is 3 more than 4 times its width.IF the perimeter of the crayon box is 21 centimeters,find the lenght and width. \n" ); document.write( "
Algebra.Com's Answer #138233 by checkley77(12844)\"\" \"About 
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L=3+4W
\n" ); document.write( "P=2L+2W
\n" ); document.write( "21=2(3+4W)+2W
\n" ); document.write( "21=6+8W+2W
\n" ); document.write( "21=6+10W
\n" ); document.write( "10W=21-6
\n" ); document.write( "10W=15
\n" ); document.write( "W=15/10
\n" ); document.write( "W=1.5 C. ANS.
\n" ); document.write( "L=3+4*1.5
\n" ); document.write( "L=3+6
\n" ); document.write( "L=9 C. ANS.
\n" ); document.write( "PROOF:
\n" ); document.write( "21=2*9+2*1.5
\n" ); document.write( "21=18+3
\n" ); document.write( "21=21\r
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