document.write( "Question 207083: the lenght of a rectangle is three times the width. what is the width if the area is 147 square feet? \n" ); document.write( "
Algebra.Com's Answer #156673 by jringelman(2)\"\" \"About 
You can put this solution on YOUR website!
start with 2 equations
\n" ); document.write( "l=3w
\n" ); document.write( "lw=147
\n" ); document.write( "use first equation to substitute \"3w\" for \"l\" in 2nd equation
\n" ); document.write( "(3w)w=147
\n" ); document.write( "3w^2=147
\n" ); document.write( "w^2=49
\n" ); document.write( "w=7 (this is the answer)\r
\n" ); document.write( "\n" ); document.write( "verify
\n" ); document.write( "l=3w=3*7=21
\n" ); document.write( "lw=7*21=147
\n" ); document.write( "
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