
Since we need to solve for r we have to leave that variable alone in one side of the equation. We notice that at is adding in the right side, then it goes to the left side substracting, that is:

Therefore:

in the last part we only switch the sides of the equation.
Answer:
X=3
Step-by-step explanation:
I hope this helps!
Could you please give a little more info on this problem?? I wanna help but im confused
By Stoke's theorem, the line integral of

along

(presumably the *boundary* of the triangle, and not the triangle itself)

is given by the surface integral of

along the surface with boundary

,

First, compute the curl of

:

Not sure what kind of parameterization you're given for

, but you can use

where
![(u,v)\in[0,1]\times[0,1]](https://tex.z-dn.net/?f=%28u%2Cv%29%5Cin%5B0%2C1%5D%5Ctimes%5B0%2C1%5D)
. Then

So the surface integral is equivalent to


