document.write( "Question 147979: need answer :)
\n" ); document.write( "If f(x)=2x, then f(3) equals what? \r
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Algebra.Com's Answer #108360 by Alan3354(69443)\"\" \"About 
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If f(x)=2x, then f(3) equals what?
\n" ); document.write( "Sub 3 for x
\n" ); document.write( "f(3) = 2*3
\n" ); document.write( "f(3) = 6
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