Ask Me Help Desk - I am trying to figure out how to solve Functions

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how to solve Functions?

how to solve this question:

formula:
f(x)= x+3
-----
x

solve:
f(x) = 1/4

I solved f(1/4) but I couldn't solve that one... what is the diffrence?

thanks :)

$f(x)=\frac{x+3}{x}$

$f(\frac14)=\frac{\frac {1}{4}+3}{\frac14}$

$f(\frac14)=\frac{\frac {1}{4}+\frac{12}{4}}{\frac14}$

$f(\frac14)=\frac{\frac {13}{4}}{\frac14}=13$

--- difference from what?

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