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in this lesson were going to focus on solving basic logarithmic equations lets start with this one log base 2 of 16 is equal to x go ahead and find the value of x what we need to do is convert it to exponential form 2 raised to the x is equal to 16. now you might already see the answer but im going to go ahead and solve it now we know that 2 to the 4th power is 16. so therefore x is equal to four you can also do this log of 16 divided by log of two if you type that in thats equal to four which is x using the change of base formula try this one log of x log base x of 81 is equal to four what is x so lets convert it to its exponential form x to the fourth is 81. so now lets find the value of x to do that we need to take the fourth root of both sides so the fourth root of 81 is equal to 3 because three to the fourth is eighty-one now what about this one log base five of x is equal to three convert it to its exponential form five to the third is equal to x thats five times five tim