Thread: Quick algebra question

In a line:
u=nv+nln(theta)
(y=mx+b, n and theta are constants, v=x, u=y)

u = -3.89
v = 0

or

u=-1.9
v=0.693

How can I isolate and find either n or theta?

Just write it out

$\displaystyle -3.89 = n \cdot 0 + n \ln \theta$
$\displaystyle -3.89 = {\color{blue}n \ln \theta}$

$\displaystyle -1.9 = 0.693 n + {\color{blue}n\ln \theta}$