Answer:
a)you can do this two ways
b)you have only one way you can do it
To solve for n you have to get n on one side of the equation by itself.
n-6m=8
take -6m and add to both sides. so the side that has n evens out to 0. then you have
n=6m+8
it is this way because you can only add like terms. This should be all you need to do.
Hope this helps
I would go with A because if u use the distributive property u get something very similar