Question

t/s=6/5 is equivalent to s/t=5/6 where s ≠ 0 and t ≠ 0.
True or False

Answer 1

True.
Because either t is 6 and s is 5 (from the first equation), or they are both a common multiple of 6 and 5, and then we can cancel t/s and get 6/5.

Answer 2

And then for the second one, after we do all our canceling, we get 5/6, for the same reason.

Answer 3

Right, you could also say that you are raising both sides to the negative first power, so the equation stays true.