what is ; s=(u+v) x t/2

t = (2 s)/(x (u + v)) and x (u + v) must not = 0

 

u = (2 s)/(t x) - v and t must not = 0

 

v = (2 s)/(t x) - u and t x must not = 0

Sorry, I mistook * for x.

 

t = (2 s)/(u + v) and u + v must not =0

u = (2 s)/t - v and t must not =0

v = (2 s)/t - u and t must not=0