document.write( "Question 95583: How do a rewrite an equation as the function (x). \n" ); document.write( "
Algebra.Com's Answer #69643 by kiljoy(51)\"\" \"About 
You can put this solution on YOUR website!
Typically you would solve the equation for the y variable and replace it as f(x) or g(x), etc.\r
\n" ); document.write( "\n" ); document.write( "So something like,
\n" ); document.write( "\"3x%2By=9\"
\n" ); document.write( "Could be solved for y.
\n" ); document.write( "\"y=-3x%2B9\"
\n" ); document.write( "Then you would replace the y with f(x)
\n" ); document.write( "\"f%28x%29=-3x%2B9\"
\n" ); document.write( "This way you would solve for y when given an f(x).
\n" ); document.write( "So if you wanted to solve for f(2) It would be as follows.
\n" ); document.write( "\"f%282%29=-3%282%29%2B9\"
\n" ); document.write( "\"f%282%29=-6%2B9\"
\n" ); document.write( "\"f%282%29=3\"
\n" ); document.write( "This gives us the solution (2,3)
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