Given that
[tex]g(x)=\frac{5x}{6}-4[/tex]The value of g(18) can then be obtained by substituting the value of x=18 into the equation
=>
[tex]\begin{gathered} g(18)=\frac{5\times18}{6}-4 \\ \\ g(18)=5\times3-4=15-4 \\ g(18)=11 \end{gathered}[/tex]The value of g(18) = 11
