Applicare la formula: $x+a=b$$\to x=b-a$, dove $a=-\cos\left(b\right)+3\tan\left(y\right)$, $b=3$, $x+a=b=2\sin\left(a\right)-\cos\left(b\right)+3\tan\left(y\right)=3$, $x=2\sin\left(a\right)$ e $x+a=2\sin\left(a\right)-\cos\left(b\right)+3\tan\left(y\right)$

Applicare la formula: $ax=b$$\to x=\frac{b}{a}$, dove $a=2$, $b=3+\cos\left(b\right)-3\tan\left(y\right)$ e $x=\sin\left(a\right)$

Applicare la formula: $a=b$$\to inverse\left(a,a\right)=inverse\left(a,b\right)$, dove $a=\sin\left(a\right)$ e $b=\frac{3+\cos\left(b\right)-3\tan\left(y\right)}{2}$

Applicare la formula: $\arcsin\left(\sin\left(\theta \right)\right)$$=\theta $, dove $x=a$