document.write( "Question 470981: x =24 when y =8 find x when y =9 \n" ); document.write( "
Algebra.Com's Answer #323047 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "If \"x\" varies directly as \"y\", and if \"x=24\" when \"y=8\", to find \"x\" when \"y=9\" use this formula:\r
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\n" ); document.write( "\n" ); document.write( "\"y+=+kx\"\r
\n" ); document.write( "\n" ); document.write( "Substitute \"x=24\" and \"y=8\" to find \"k\",\r
\n" ); document.write( "\n" ); document.write( "\"8+=+k%2A24\"\r
\n" ); document.write( "\n" ); document.write( "\"k+=+8%2F24\"\r
\n" ); document.write( "\n" ); document.write( "\"k+=+1%2F3\"\r
\n" ); document.write( "\n" ); document.write( "So the equation is,\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%281%2F3%29x\"\r
\n" ); document.write( "\n" ); document.write( "Now, substitute \"y+=+9\" to find \"x\":\r
\n" ); document.write( "\n" ); document.write( "\"9+=+%281%2F3%29x\"\r
\n" ); document.write( "\n" ); document.write( "\"x+=+27\"\r
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