solution.ipynb

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   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
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     "text": [
      "x1 = 3.0\n",
      "x2 = 4.0\n"
     ]
    }
   ],
   "source": [
    "a = [\n",
    "    [-1, 4, 1, 0],\n",
    "    [2, 1, 0, 1],\n",
    "    [0, 0, 1, 0],\n",
    "    [0, 0, 0, 1]\n",
    "]\n",
    "b = [13, 10, 0, 0]\n",
    "x1, x2, x3, x4 = np.linalg.solve(a, b)\n",
    "print('x1 =', x1)\n",
    "print('x2 =', x2)"
   ]
  }
 ],
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