First, let's rewrite the equation with the logarithms combined:
5log5(x) - log5(x) = 18

Next, let's simplify the equation by combining the logarithms:
4log5(x) = 18

Now, divide both sides by 4 to isolate the logarithm:
log5(x) = 4.5

To remove the logarithm, rewrite the equation in exponential form:
5^(4.5) = x

Calculate the value of x:
x = 177.827

Therefore, the solution to the equation is x = 177.827.