document.write( "Question 652531: The length of a rectangular room is 6 feet longer than twice the width. If the room's perimeter is 152 feet, what are the rooms dimensions? \n" ); document.write( "
Algebra.Com's Answer #408006 by Shana-D77(132)![]() ![]() You can put this solution on YOUR website! Ok, so let's start by translating this problem literally:\r \n" ); document.write( "\n" ); document.write( "\"The length of a rectangular room is 6 feet longer than twice the width\" \n" ); document.write( "L = 2w + 6 (remember \"=\" reads as \"is\")\r \n" ); document.write( "\n" ); document.write( "\"If the Perimeter is 152 feet\" \n" ); document.write( "P = 152\r \n" ); document.write( "\n" ); document.write( "We know that the perimeter of a rectangle is L + L + W + W or 2L + 2W\r \n" ); document.write( "\n" ); document.write( "So, we have 152 = 2L + 2W\r \n" ); document.write( "\n" ); document.write( "Our two equations are then: \n" ); document.write( "L = 2w + 6 \n" ); document.write( "2L + 2w = 152\r \n" ); document.write( "\n" ); document.write( "Since the first equation is solved for L, let's get the second equation also solved for L:\r \n" ); document.write( "\n" ); document.write( "2L + 2w = 152 \n" ); document.write( "L + w = 76 (dided everything by 2) \n" ); document.write( "L = 76 - w (subtracted w from both sides)\r \n" ); document.write( "\n" ); document.write( "Now we have: \n" ); document.write( "L = 2w + 6 \n" ); document.write( "L = 76 - w\r \n" ); document.write( "\n" ); document.write( "Since they're both =L, they're equal to each other (transitive peoperty):\r \n" ); document.write( "\n" ); document.write( "2w + 6 = 76 - w\r \n" ); document.write( "\n" ); document.write( "3w + 6 = 76 (added w to both sides)\r \n" ); document.write( "\n" ); document.write( "3w = 70 (subtracted 6 from both sides)\r \n" ); document.write( "\n" ); document.write( "w = 70/3 or 23.333 feet (23 feet, 4 inches)\r \n" ); document.write( "\n" ); document.write( "To find L, we can plug our w back into any of the equations we used. The easiest may be the 152 = 2L + 2w equation:\r \n" ); document.write( "\n" ); document.write( "152 = 2L + 2(70/3) \n" ); document.write( "152 = 2L + 140/3 \n" ); document.write( "316/3 = 2L (subtracted 140/3 from both sides) \n" ); document.write( "L = 158/3 (52.66 feet or 52 feet and 8 inches)\r \n" ); document.write( "\n" ); document.write( "w = 23 feet, 4 inches \n" ); document.write( "L = 52 feet, 8 inches \n" ); document.write( " |