document.write( "Question 1150409: The perimeter of parallelogram ABCD is 80 cm. AD is 7 cm more than twice AB. Find the lengths of all four sides of ABCD. \n" ); document.write( "
| Algebra.Com's Answer #771963 by Cromlix(4381)     You can put this solution on YOUR website! Hi there, \n" ); document.write( "If you make AB = x \n" ); document.write( "then AD = 2x + 7 \n" ); document.write( "Therefore two sides AB and DC = x \n" ); document.write( "and sides AD and BC = 2x + 7 \n" ); document.write( "AB + DC + AD + BC \n" ); document.write( "x + x + 2x + 7 + 2x + 7 = 80 \n" ); document.write( "6x + 14 = 80 \n" ); document.write( "6x = 80 - 14 \n" ); document.write( "6x = 66 \n" ); document.write( "x = 11. \n" ); document.write( "Sides AB and DC = 11 cm \n" ); document.write( "Sides AD and BC = 29 cm \n" ); document.write( "Hope this helps :-) \n" ); document.write( " |