document.write( "Question 667047: The perimeter of a tennis court is 228 feet. After a round of tennis, a player's coach estimates that the athlete has run a total of 690 feet, which is equivalent to 7 times the court's length plus four times its width. What are the dimensions? \n" ); document.write( "
Algebra.Com's Answer #414802 by mananth(16946)\"\" \"About 
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let length =x
\n" ); document.write( "width y\r
\n" ); document.write( "\n" ); document.write( "2(x+y) = perimeter\r
\n" ); document.write( "\n" ); document.write( "2(x+y)=228
\n" ); document.write( "x+y=114...................(1)\r
\n" ); document.write( "\n" ); document.write( "7x+4y=690.................(2)\r
\n" ); document.write( "\n" ); document.write( "multiply equation (1) by -4
\n" ); document.write( "we get -4x-4y=-456
\n" ); document.write( "add this equation to (2)
\n" ); document.write( "3x= 234
\n" ); document.write( "/3
\n" ); document.write( "x= 78 the length\r
\n" ); document.write( "\n" ); document.write( "plug x in (1)
\n" ); document.write( "x+y=114
\n" ); document.write( "78+y=114
\n" ); document.write( "y=114-78
\n" ); document.write( "y=36 the width\r
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