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)
u/6 = 7.68 // - 7.68
u/6-7.68 = 0
1/6*u-7.68 = 0 // + 7.68
1/6*u = 7.68 // : 1/6
u = 7.68/1/6
u = 46.07999908
u = 46.07999908
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