We have 3 equations with 3 unknowns x, y, and z and we are to solve for these unknowns.
Equations 4x -3y +z = -10, 2x +y +3z = 0, and -x +2y -5z = 17 will be passed in as an array of [[4, -3, 1, -10], [2, 1, 3, 0], [-1, 2, -5, 17]] and the result should be returned as an array like [1, 4, -2] (i.e. [x, y, z]).

Note: In C++ do not use new or malloc to allocate memory for the returned variable as allocated memory will not be freed in the Test Cases. Setting the variable as static will do.

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

def _disabled_input(*args, **kwargs):
    raise RuntimeError("input() is disabled in callable mode")
builtins.input = _disabled_input

ns = {"__name__": "__judge__"}  # prevent if __name__ == "__main__" blocks
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = 'def solve_eq(eq):\n    a1, b1, c1, d1 = eq[0]\n    a2, b2, c2, d2 = eq[1]\n    a3, b3, c3, d3 = eq[2]\n\n    x = ((b1*c2*d3 - b1*c3*d2 - b2*c1*d3 + b2*c3*d1 + b3*c1*d2 -\n          b3*c2*d1)/(a1*b2*c3 - a1*b3*c2 - a2*b1*c3 + a2*b3*c1 +\n          a3*b1*c2 - a3*b2*c1))\n\n    y = ((-a1*c2*d3 + a1*c3*d2 + a2*c1*d3 - a2*c3*d1 - a3*c1*d2 +\n         a3*c2*d1)/(a1*b2*c3 - a1*b3*c2 - a2*b1*c3 + a2*b3*c1 +\n         a3*b1*c2 - a3*b2*c1))\n\n    z = ((a1*b2*d3 - a1*b3*d2 - a2*b1*d3 + a2*b3*d1 + a3*b1*d2 -\n         a3*b2*d1)/(a1*b2*c3 - a1*b3*c2 - a2*b1*c3 + a2*b3*c1 +\n         a3*b1*c2 - a3*b2*c1))\n    \n    return [x, y, z]\n\n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'solve_eq'
if _fn_name:
    if "Solution" in ns:
        try:
            _obj = ns["Solution"]()
            if hasattr(_obj, _fn_name):
                _target = getattr(_obj, _fn_name)
        except Exception:
            _target = None
    if _target is None and _fn_name in ns and callable(ns[_fn_name]):
        _target = ns[_fn_name]
# Fallback: if there's exactly one user-defined function, use it
if _target is None:
    _cands = [v for k, v in ns.items() if callable(v) and getattr(v, "__module__", "") in ("__judge__", "__main__")]
    _user_funcs = [c for c in _cands if getattr(c, "__name__", "").startswith("_") is False]
    if len(_user_funcs) == 1:
        _target = _user_funcs[0]
if _target is None:
    raise RuntimeError(f"Could not resolve callable '{_fn_name}'")

_raw = sys.stdin.read().strip()
if _raw:
    _parsed = json.loads(_raw)
    if isinstance(_parsed, dict):
        _kwargs = _parsed.get("kwargs", {})
        _args = _parsed.get("args", [])
    else:
        _args, _kwargs = _parsed, {}
else:
    _args, _kwargs = [], {}
if not isinstance(_args, (list, tuple)):
    _args = [_args]
_res = _target(*_args, **_kwargs)
try:
    sys.stdout.write(repr(_res) + "\n")
except Exception:
    pass

```

Measured memory_bytes: 6146