{ 1*k1*x1 + 1*k1*x2 + 1*k2*x6 + 1*k2*x7 = k1*k28 + k2*k29,
  1*k1*x2 + 1*k1*x4 + 1*k2*x5 + 1*k2*x7 + 1*k1*x9 + 1*k2*x10 = k1*k30 + k2*k31,
  1*k1*x3 + 1*k1*x4 + 1*k2*x5 + 1*k2*x8 = k1*k32 + k2*k33 }