document.write( "Question 75370: the perimeter of a rectangle is 84 cm. the length is twice the width. Find the length and width. \n" ); document.write( "
Algebra.Com's Answer #54073 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! 2l+2w=perimeter \n" ); document.write( "2*2w+2w=84 \n" ); document.write( "4w+2w=84 \n" ); document.write( "6w=84 \n" ); document.write( "w=84/6 \n" ); document.write( "w=14 solution for the width. \n" ); document.write( "2*14=28 for the length. \n" ); document.write( "proof \n" ); document.write( "2*28+2*14=84 \n" ); document.write( "56+28=84 \n" ); document.write( "84=84\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |