document.write( "Question 1091802: If x and y vary directly, and x=10 when y=3, what will be the value of x when y=9?? \n" ); document.write( "
Algebra.Com's Answer #706256 by Edwin McCravy(20060)\"\" \"About 
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\n" ); document.write( "If x and y vary directly, \r
\n" ); document.write( "\n" ); document.write( "\"x=ky\"\r
\n" ); document.write( "\n" ); document.write( "and x=10 when y=3, \r
\n" ); document.write( "\n" ); document.write( "\"x=ky\"
\n" ); document.write( "\"10=k3\"
\n" ); document.write( "\"10%2F3=k\"
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\r\n" );
document.write( "Substituting for k in\r\n" );
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document.write( "\"x=ky\"\r\n" );
document.write( "\"x=expr%2810%2F3%29y\"\r\n" );
document.write( "

\n" ); document.write( "what will be the value of x when y=9??
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\r\n" );
document.write( "Substitute 9 for y in\r\n" );
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document.write( "\"x=expr%2810%2F3%29y\"\r\n" );
document.write( "\"x=expr%2810%2F3%29%289%29\"\r\n" );
document.write( "\r\n" );
document.write( "\"x=expr%2810%2Fcross%283%29%29%28%22%22%5E3cross%289%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "\"x=30\"\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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