Answer:
B) Collect variables terms on one side.
Step-by-step explanation:
Here, the given equation is,

By Distributive property in right side,

Subtracting 8 on both sides, ( Isolating variable x )

Collect like terms,

Dividing both sides by 2 ( Isolating variable x )

Which is the solution of the given equation,
Hence, by the above explanation it is clear that we used all options except option B.
⇒ Option B would not be a step in solving 18=2(4+x).