The answer is 42.
The question is asking for angle N. We know from the question that angle N is equal to angle E (Don't think about the scale factor because it only applies to the sides. They're just trying to trick you).
To find angle E:

Move numbers to the right side:

Combine like terms:

Divide both sides by 13:

The formula for angle E:

Plug in the 8:

The angle measure of E is 42. So angle N is automatically 42 too.
To solidify, we can try to use the formula which they give us for angle N:
The answer you are looking for is 339
20% because there are 10 numbers and 2 of them are a multiple of 5. :)
Answer:

Step-by-step explanation:
The given expression is 
We apply the distributive property to expand the parenthesis

Regroup similar terms to get:

Combine the similar terms to obtain:

The correct option is C.