Answer:
105 degrees
Step-by-step explanation:
If j and k are vertical, then they are equal. So, the first progression is to set both angles equal to each other.
3x+21=5x-35
and solve for x
21=2x-35
56=2x
x=28
then plug x back into either equation (since they are equal you just need to find one)
3(28)+21 = 105
So, the angle of k or j is 105 degrees.
k = 105
