Answer:
t = (g/c - 1)/r
Step-by-step explanation:
g=c(1+rt)
g/c=c(1+rt)/c
g/c= 1+rt
g/c-1= 1-1+rt
g/c-1 = rt
(g/c-1)/r = rt/r
(g/c-1)/r = t
