If 22x + 4 =16x, then 2x is equal to

The correct answer is (a).

To solve for $2x$, we can subtract $16x$ from both sides of the equation $22x + 4 = 16x$. This gives us $22x – 16x = 4$. Simplifying, we get $6x = 4$. Dividing both sides by $6$, we get $x = \boxed{2}$.

Option (b) is incorrect because $4$ is not a solution to the equation $22x + 4 = 16x$. Option (c) is incorrect because $8$ is not a solution to the equation $22x + 4 = 16x$. Option (d) is incorrect because $16$ is not a solution to the equation $22x + 4 = 16x$.