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