Answer:
None of those answers are right. It should be

Explanation:
You have to find common denominators first. Multiply -5/6 by 4/4 to get -20/24. Multiply 1/8 by 3/3 to get 3/24.

Subtract 3/24 from both sides since it is being added.

Since there are two negatives on the left, add the fractions together and keep the negative sign.

You cannot reduce this fraction.