x_{16} = \frac{453}{200} \cdot k_{1}\\
1 \cdot k_{19} \cdot x_{6} + 1 \cdot k_{19} \cdot x_{7} = k_{19} \cdot k_{20}\\
1 \cdot k_{19} \cdot x_{9} + 1 \cdot k_{19} \cdot x_{10} = k_{19} \cdot k_{21}\\
1 \cdot k_{19} \cdot x_{12} + 1 \cdot k_{19} \cdot x_{13} = k_{19} \cdot k_{22}