Stoichiometric quantity of AgNO₃ solid is added to a KCl solution 10x% variation is expected in the elevation in boiling point. What is x ?

${\mathrm{AgNO}}_3\left(\mathrm{s}\right)+\mathrm{KI}\left(\mathrm{aq}\right)⟶\mathrm{AgI}\left(\mathrm{s}\right)+{\mathrm{KNO}}_3$
Before addition AgNO₃ to KI_(aq) no. of particles = 2
after addition no. of particles = 2
$\begin{array}{l}{\mathrm{\Delta T}}_{\mathrm{b}}=\mathrm{i}\times {\mathrm{K}}_{\mathrm{b}}\times \mathrm{m};{\mathrm{\Delta T}}_{\mathrm{b}}=2{\mathrm{K}}_{\mathrm{b}}\mathrm{m}\dots \dots \left(1\right)\\ (1+0.1\mathrm{x}){\mathrm{\Delta T}}_{\mathrm{b}}=2{\mathrm{K}}_{\mathrm{b}}\mathrm{m}\dots \dots \left(2\right)\\ \frac{\left(1\right)}{\left(2\right)}=\frac{1}{(0.1\mathrm{x}+1)}=\frac{2}{2}\\ 2=0.2\mathrm{x}+2\Rightarrow 0.2\mathrm{x}=0\Rightarrow \mathrm{x}=\frac{0}{0.2}=0\end{array}$