I have no idea what the answer to this equation is

Given: g(x) = 4x - 7
Find: g(5)
Substitute x = 5, to the given equation and we get
[tex]\begin{gathered} g(x)=4x-7 \\ g(5)=4(5)-7 \\ g(5)=20-7 \\ g(5)=13 \\ \\ \text{Therefore, }g(5)=13 \end{gathered}[/tex]