1 \cdot k_{12} \cdot x_{2} + 1 \cdot k_{12} \cdot x_{4} + 1 \cdot k_{12} \cdot x_{8} = k_{12} \cdot k_{108}\\
1 \cdot k_{12} \cdot x_{11} + 1 \cdot k_{12} \cdot x_{13} = k_{12} \cdot k_{109}