Question 388395
Your notation is a tad unclear!
When you write {{{Log54}}} do you mean {{{Log[5](4)}}} where 5 is the base of the logarithm?
I am going to assume that this is what you meant, so...
If you'll recall the definition of the logarithm of a number..."The logarithm of a number is the power to which the base must be raised to equal that number."
a) {{{X = Log[5](4)}}} ---> {{{5^X = 4}}} In words, the logarithm of 4 is the power (X) to which the base (5) must be raised to equal that number (4).
b) {{{7 = Log[6](Y)}}} ---> {{{6^7 = Y}}}
c) {{{X = Log[8](Y)}}} ---> {{{8^X = Y}}}
d) {{{90 = Log[4](Z)}}} ---> {{{4^90 = Z}}}