The three really doesn't mean anything. the only thing the 3 stands for is how many times you have to multiply 0.25 . so in this situation you have to multiply 0.25 3 times.
this is how you do it when you get problems with exponents. this is the work /answer : 0.25×0.25×0.25=0.015625
You would have to insert the number into the variable. For example,
Then, you would isolate the x value (3x).
Simplify.
Finally, divide both sides by the coefficient.
You end up with
We can't help you because that doesn't give us a lot of information.