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