document.write( "Question 1000131: A poster is 24 cm taller than it is wide. If it is mounted on a piece of cardboard so that there is a 6cm boarder on all sides and if the area of the boarder is 720cmsquared What are the dimensions of the poster \n" ); document.write( "
Algebra.Com's Answer #617669 by josgarithmetic(39617)\"\" \"About 
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Disgarded previously posted solution, and replacing with this one:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "t for how tall the poster, w for how wide the poster
\n" ); document.write( "x for uniform width of the border;
\n" ); document.write( "t=w+24
\n" ); document.write( "x=6
\n" ); document.write( "-
\n" ); document.write( "Total area is \"%28t%2B2x%29%2A%28w%2B2x%29\"
\n" ); document.write( "Border Area is \"%28t%2B2x%29%28w%2B2x%29-tw=720\"\r
\n" ); document.write( "\n" ); document.write( "STEPS
\n" ); document.write( "\"tw%2B2xw%2B2xt%2B4x%5E2-tw=720\"
\n" ); document.write( "\"2xw%2B2xt%2B4x%5E2-720=0\"
\n" ); document.write( "\"xw%2Bxt%2B2x%5E2-360=0\"
\n" ); document.write( "\"xw%2Bx%28w%2B24%29%2B2x%5E2-360=0\"
\n" ); document.write( "\"xw%2Bxw%2B2%2A24%2B2x%5E2-360=0\"
\n" ); document.write( "\"2xw%2B2%2A24%2B2x%5E2-360=0\"
\n" ); document.write( "\"xw%2B24%2Bx%5E2-360=0\"
\n" ); document.write( "\"xw=360-24-x%5E2\"
\n" ); document.write( "\"w=%28360-24-x%5E2%29%2Fx\"
\n" ); document.write( "Substitute for the assigned x=6
\n" ); document.write( "\"w=%28360-24-36%29%2F6\"
\n" ); document.write( "Evaluate w,
\n" ); document.write( "\"w=60-4-6\"
\n" ); document.write( "\"highlight%28w=50%29\"------width of poster\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"t=50%2B24\"
\n" ); document.write( "\"highlight%28t=74%29\"-------how tall the poster
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