code: def test_solve_lin_sys_3x4_one():
      domain, x1, x2, x3 = ring("x1,x2,x3", QQ)
      eqs = [
          x1 + 2 * x2 + 3 * x3,
          2 * x1 - x2 + x3,
          3 * x1 + x2 + x3,
          5 * x2 + 2 * x3,
      ]
      sol = {x1: 0, x2: 0, x3: 0}
      assert solve_lin_sys(eqs, domain) == sol
  
file_path: sympy/sympy/polys/tests/test_solvers.py
imports: from sympy.matrices import Matrix
  from sympy.polys.domains import ZZ, QQ
  from sympy.polys.fields import field
  from sympy.polys.rings import ring
  from sympy.polys.solvers import solve_lin_sys, eqs_to_matrix
label_desc: Use image node_id 3 for calling a global function with example usage: test_solve_lin_sys_3x4_one() without return types