document.write( "Question 178025This question is from textbook Geometry
\n" ); document.write( ": I am not sure how to do this type of problem :( The perimeter of a rectangle is 84 ft. the ratio of the width to the length is 2:5. Find the length and the width \n" ); document.write( "
Algebra.Com's Answer #132981 by HyperBrain(694)\"\" \"About 
You can put this solution on YOUR website!
Let x=length
\n" ); document.write( "y=width\r
\n" ); document.write( "\n" ); document.write( "The perimeter of a rectangle is 84 ft. So,
\n" ); document.write( "

\n" ); document.write( "2(x+y)=84
\n" ); document.write( "x+y=42
\n" ); document.write( "

\n" ); document.write( "the ratio of the width to the length is 2:5 so
\n" ); document.write( "

\n" ); document.write( "\"y%2Fx=2%2F5\"
\n" ); document.write( "5y=2x
\n" ); document.write( "y=2x/5
\n" ); document.write( "

\n" ); document.write( "Substituting this to x+y=42,
\n" ); document.write( "

\n" ); document.write( "x+(2x/5)=42
\n" ); document.write( "(5x/5)+(2x/5)=42
\n" ); document.write( "7x/5=42
\n" ); document.write( "x/5=6
\n" ); document.write( "x=6*5=30>>length
\n" ); document.write( "x+y=42
\n" ); document.write( "y+30=42
\n" ); document.write( "y=42-30=12>>width
\n" ); document.write( "

\n" ); document.write( "Power up,
\n" ); document.write( "HyperBrain!
\n" ); document.write( "

\n" ); document.write( "Please help us with our advocacy \"use less plastic\":
\n" ); document.write( "http://uselessplastic.wordpress.com/
\n" ); document.write( "http://uselessplastic.multiply.com/ \n" ); document.write( "
\n" );