S= a(x-vt) for t. T=

1. Start with the equation: S = a(x - vt)

2. Expand the expression in parentheses: S = ax - avt

3. Isolate the term with t on one side: avt = ax - S

4. Solve for t by dividing both sides by av : t = \frac{ax - S}{av}

Answer: t = \frac{ax - S}{av}