I am not trying to solve for V, but only h or b in terms of V, but not h in terms of b or b in terms of h (the line where you solve has b in terms of h).
Like I implied, maybe it is not possible. (?)
Let "#" be a possible number(s), if any, unknown now, but not in the solution, and let "?", be an operation(s), if any, unknown now but not in the solution:
Something like b = # ? V#
or
h = # ? V#
Thanks.