If it's not what You are looking for type in the equation solver your own equation and let us solve it.
u in (-oo:+oo)
1 = u/2 // - u/2
1-(u/2) = 0
1-1/2*u = 0 // - 1
-1/2*u = -1 // : -1/2
u = -1/(-1/2)
u = 2
u = 2
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