Answer: The answer is X = 30
Explanation:
I mostly just did the "guess and check" method until I got 30, this answer seemed right, here are the angle measurements as well:
For 4(x)-16, I put 30 in for x, solved using basic arithmetic, and the angel comes out to be 104 degrees.
For 2(x)+16, I put 30 in for x, did basic arithmetic again, and the angel came out to be 76 degrees.