W
Enter the value of x-21.
(x - 21)
71

v v cj van config k tbs eng r.c r.c fcb fb gb frfr

where's the diagram?

step-by-step explanation:

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: