Question 165694
To do this type of problem
1)substitute the "given" number for x everywhere in the original expression
2)simplify the result

{{{f(x) = 3x – 5}}}  substitute 2 for x everywhere in the original expression
{{{f(2) = 3*(2) - 5}}} simplify the result
{{{f(2) = 6 - 5}}}
{{{f(2) = 1}}}

Get it?