If $$x$$ is a positive quantity, then what is the value of $$3x$$, if $$0.4\overline{23}-0.2$$ of $$52.5\div0.84=x^{2}-(0.0\overline{21}+12.5)$$ ?

A

$$2$$

B

$$\frac{1}{4}$$

C

$$\frac{1}{2}$$

D

$$1$$