Answer:
x = 47

Explanation:
Given functions:

Calculate the value of f(4) by substituting x = 4 into function f(x):

Find the expression for g(x + 1) by substituting x = x + 1 into function g(x):

To find the value of x when f(4) = g(x + 1), substitute the found value of f(4) and the found expression for g(x + 1) into the equation, and solve for x:

Therefore, the value of x is 47.