$$3x-5<0$$ $$x-3<0$$
The solution satisfying both inequalities is $x<\frac{5}{3}$.$$x<\frac{5}{3}$$
Consider the case when $3x-5$ and $x-3$ are both positive.$$x-3>0$$ $$3x-5>0$$
The solution satisfying both inequalities is $x>3$.$$x>3$$
The final solution is the union of the obtained solutions.$$x<\frac{5}{3}\text{; }x>3$$