How do u do logarithms where there is a log on one side and a number on the other...

Example-
-21.044=log(P/30)

I don't want just an answer to the example, i need to know how to do it please...

convert your log equation into an exponential equation.
-21.044=log(P/30) <------> 10^-21.044 = p/30
almost zero = p/30
p = almost zero

To solve a logarithmic equation like the one you provided, you need to convert it into an exponential equation.

In your example, the equation is:

-21.044 = log(P/30)

To convert this to an exponential equation, you can rewrite it as:

10^(-21.044) = P/30

Now, to solve for P, you can multiply both sides of the equation by 30:

30 * 10^(-21.044) = P

You might need a calculator for this part. Evaluate 10^(-21.044), and then multiply the result by 30. This will give you the value of P.

It's important to note that in this specific case, the value of P will be very close to zero because 10^(-21.044) is extremely small.