Answer:
The correct option is D) Subtract 3 from both sides.
Explanation:
Consider the provided equation

Step 1:
Now add 8.5x to each side of the above equation.

Add the like terms.

Step 2:
Now to isolate the variable we need to subtract 3 from both the sides.


We need to find the next step that result in the variable terms and constant terms being on different sides of the equals sign.
Thus, the required step is "Subtract 3 from both sides."
Hence, the correct option is D) Subtract 3 from both sides.