How do I solve for u?

Question

(u/1-u) + 1 = 1.5

Answer 1

Do you mean (u/1)-u or (u)/(1-u)?

Answer 2

I will assume you mean

u/(1-u) + 1 = 1.5

u/(1-u) = 1/2
2u = 1-u
3u = 1

u =1/3