Question 383504
t/ (2t-s)=3s 
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Cross-multiply to get:
t = 3s(2t-s)
t = 6st - 3s^2
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6st-t = 3s^2
t(6s-1) = 3s^2
t = (3s^2)/(6s-1)
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Cheers,
Stan H.