Question

U=b+k-a, solve for a​

Answer 1

I do not believe you can solve this unless the variable mean something and it is specified

Answer 2

a=b+k−u

Explanation:

u=b+k−a

−a+b+k=u

−a+b+k+−b=u+−b

−a+k=−b+u

−a+k+−k=−b+u+−k

−a=−b−k+u

−a−1=−b−k+u−1

a=b+k−u