Answer:
x=1
Step-by-step explanation:
x is always =1 so add them
I'm assuming that you mean

because if you meant

then u would simplify and you couldn't make it the subject.
Under this assumption, we start with

We multiply both sides by 

We expand the left hand side:

We move all terms involving u to the left and all terms not involving u to the right:

We factor u on the left hand side:

We divide both sides by 

4 because you take 2²= 2 times 2 = 4
Slope is -1/2
2-4/6-2=
-1/2
m=-1/2