What is the resistance r in the figure

Question:

What is the resistance R in the figure?

What is the emf of the battery in the figure?

Answer 1:

10*2+R*2 = 3*R
R = 20 ohms

V = 3*R = 60V

Answer 2:

3R= 2 (10 +R)
R = 20 ohms

emf = 60V