Answer:
B. The error is in step 2,
combine to make
not
.
Explanation:
We have been an image that represents Grant's solution of an equation. We are asked to find Grant's error.

Let us see our given equation by using distributive property
.

Now we will gather like terms.


Upon looking at Grant's work, we can see that he combined
incorrectly. Instead of subtracting x, he added x to 3x, therefore, Grant made an error in step 2 and option B is the correct choice.