\(\left\{{}\begin{matrix}n_{K+}+3n_{Al^{3+}}=n_{Cl^-}+2n_{SO^{2-}_4}\left(BTe\right)\\39n_{K^+}+27n_{Al^{3+}}+35,5n_{Cl^-}+96n_{SO^{2-}_4}=29,525\left(BTKL\right)\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}0,15+3x=y+2\cdot0,2\\0,15\cdot39+27\cdot x+35,5\cdot y+96\cdot0,2=29,525\end{matrix}\right.\)
\(\Rightarrow\left\{{}\begin{matrix}3x-y=0,25\\27x+35,5y=4,475\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}x=0,1\\y=0,05\end{matrix}\right.\)