SOLUTION: need answer :) If f(x)=2x, then f(3) equals what?

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Question 147979: need answer :)
If f(x)=2x, then f(3) equals what?

Found 2 solutions by Alan3354, nerdybill:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If f(x)=2x, then f(3) equals what?
Sub 3 for x
f(3) = 2*3
f(3) = 6

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
If f(x)=2x, then f(3) equals what?
.
"f(x)" is a function of 'x'. All you need to do, is to replace 'x' with 3 and solve:
.
f(x)=2x
f(3)=2(3)= 6