Applicare la formula: $\ln\left(ab\right)$$=\ln\left(a\right)+\ln\left(b\right)$, dove $a=x$ e $b=y$

Applicare la formula: $x+a=b$$\to x=b-a$, dove $a=\ln\left(x\right)$, $b=2x$, $x+a=b=\ln\left(x\right)+\ln\left(y\right)=2x$, $x=\ln\left(y\right)$ e $x+a=\ln\left(x\right)+\ln\left(y\right)$

Applicare la formula: $\ln\left(a\right)=b$$\to e^{\ln\left(a\right)}=e^b$, dove $a=y$ e $b=2x-\ln\left(x\right)$

Applicare la formula: $e^{\ln\left(x\right)}$$=x$, dove $x=y$