document.write( "Question 894378: The area of a rectangle is 72 centimeters^2. What is the value of n if the length is n+9 and the width is .4?\r
\n" ); document.write( "\n" ); document.write( "I've tried and gotten two complete different answers and when checked they aren't even close to the answer. I've tried 72=n+9/.4 and got 19.18 which when checked using the original formula i got 16.92 and that is nothing close to 72. I tried doing it like this 72=.4(n+9) and got 62.6 and when checked i got 34.04 which is also not correct. I need help soon. I've asked friends also and their methods don't work. \n" ); document.write( "
Algebra.Com's Answer #542001 by ankor@dixie-net.com(22740)\"\" \"About 
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The area of a rectangle is 72 centimeters^2.
\n" ); document.write( " What is the value of n if the length is n+9 and the width is .4?
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\n" ); document.write( "Area is length * width, therefore:
\n" ); document.write( ".4(n+9) = 72
\n" ); document.write( ".4n + 3.6 = 72
\n" ); document.write( ".4n = 72 - 3.6
\n" ); document.write( ".4n = 68.4
\n" ); document.write( "n = 68.4/.4
\n" ); document.write( "n = 171 cm
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\n" ); document.write( "See if that checks out
\n" ); document.write( "L = 171 + 9 = 180
\n" ); document.write( "180 * .4 = 72 \n" ); document.write( "
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