The given equation is
[tex] f(x) =6(2)^{x-1}+4 [/tex]
And the graph of f(x) is translated 7 units to the left . So in case of left translation , we have to add 7 within the function , that is
[tex] g(x) =6(2)^{x+7-1} +4 = 6(2)^{x+6} +4 [/tex]
As we see that 7 is added within the function not with the function f(x) . And that's the required function of g(x) .