[ 1*x[2] + 1*x[3] + 1*x[4] + 1*x[5] + 1*x[9] + 1*x[10] + 1*x[11] = k[34] + k[33] + k[32],
  1*x[6] + 1*x[7] + 1*x[8] = k[35],
  1*x[12] + 1*x[13] = k[36] ]