"Find the equation of the line that is parallel to y=5-x/2 and passes through (-1,6)"

I found my answer using a different method and I'm not sure that if I were to use it in an exam, I would get full marks

So the method I used was as follows:

y=5-x/2

y=-1/2x+5 P(-1,6)

6=-1/2(-1)+b

6=1/2+b

11/2 = b

so Y=-1/2x+11/2

The one we're taught is this one:

y=5-x/2

y=-1/2x+5 P(-1,6)

y-y=m(x-x)

y-6=-1/2(x-1)

y-6=-1/2x - 1/2

y-11/2 = -1/2x

y= -1/2x+11/2

I found method 2 to be more complicated and I spent some time figuring out how it even works so I'd rather not use it in an exam. Do I have to use it? and even if I don't, should I still practice doing it? (I checked the textbook and it just says that the answer is y=-1/2x+11/2)