If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
t-(2/3) = 3.5 // - 3.5
t-(2/3)-3.5 = 0
t-2/3-3.5 = 0
t-4.16666667 = 0 // + 4.16666667
t = 4.16666667
t = 4.16666667
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