given the following functions, find the function values of g(x)=5, find g(-4)

g(x)=5, find g(-4)

g(-4)=5
-4g=5
g=-1.25

Huh?

You said g(x) = 5
which has no variables, and is always equal to 5

so g(-4) = 5

and g(-345) = 5, g(3.432) = 5
g(√89) = 5 , etc

g by itself is meaningless, you cannot treat it as a variable and solve for it like you did, it is part of the notation g(...) and means:
the "value of the function called g for the given x value"

2x - 4y = 9

To find the function values of g(x) = 5, we need to substitute the given input value into the function. In this case, we need to find g(-4).

To do this, we substitute -4 into the function g(x) and calculate the result:

g(-4) = 5

So, the function value of g(-4) is 5.