Answer:
In Step 4, the inequality sign should be flipped.
Step-by-step explanation:
Whenever you multiply or divide both sides of an inequality by a negative number, you need to flip the inequality sign. So, in Step 4, when you divide both sides by -10, the sign should be flipped.
The final answer should be:

The answer will be A due to them being on opposite sides with the triangle having adjacent measures so both of those angles given provide the same measure
lines a and d are parallel and lines b and c are parallel