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)
4.17 = u/3 // - u/3
4.17-(u/3) = 0
4.17-1/3*u = 0 // - 4.17
-1/3*u = -4.17 // : -1/3
u = -4.17/(-1/3)
u = 12.51000013
u = 12.51000013
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