I have just started to teach myself transposition. I need help with this one: any help gratefully accepted, thanks:)

k=f(s+t) subject t

How do I transpose efficiency formulae

k=f(s+t)

k/f=s+t

(k/f)-s=t

TRY this and see whether it helps:-

a = b (x + y) subject is y

Once you solve it , try with y values 1,2 and 3
Finding a few examples that would satisfy
using different value for a, b and x