Question 125708
{{{f(x)=5x-1}}} Start with the given equation. 

{{{f(a-2)=5(a-2)-1}}} Plug in {{{x=a-2}}}. 

{{{f(a-2)=5a-10-1}}} Distribute. 

{{{f(a-2)=5a-11}}} Combine like terms.