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)![]() ![]() ![]() 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( " |