A numerical solution to a problem is one that has the form of a number that can be written out in decimal (or equivalent) form, like 1.414... or 1/2....
I have to comment on your post. You wrote Any way ,please solve this prob. Are you kidding? You want us to do your work without you participating? I...
assuming that the value of b exists, then the easiest way to do this problem is to equate the constants. On the lhs the constant is -b and on the rhs...
Please ask specific questions. At the very least, we need to see what you mean by "logical math", and what sort of help you need with it; and we can...