Question

[Simple clarification needed]
Okay this is stupid question but here goes:

Make x the subject of the formula:
1/b + 2b/x = 2

okay it goes like this:
2b/x = 2 - 1/b
2b/x = (2b - 1) / b <- where does extra b come from and how?
x(2b - 1) = 2b^2
x = 2b^2 / (2b - 1)

Answer 1

oh, getting right common denominator solved it.