Transforming Functions

Question

Can you please help i am lost i need to solve for k...the problem is g(x)=f(x)+k

Answer 1

g(x) = f(x) + k

If you know what g(x) and f(x) are, just subtract f(x) from both sides and get

g(x) - f(x) = k

k = g(x) - f(x)

Answer 2

g(x)=f(x)+k

Solve for k:

k = g(x) - f(x)