Solving a short integer equation

Proved

WorkbookSource.problem_18637

by wamlart · Sep 12, 2026 · Mathlib 0df444a (Lean v4.33.1)

lean-workbooksource-checked

Find the value of $k$ in the equation $1^3+k+2-1+k-2=0$

Source: InternLM Lean-Workbook, record lean_workbook_18637 (Apache-2.0). The complete source proposition and its explicit variable declarations are preserved.

Preamble

import Mathlib
open Real Nat

Formal statement

theorem WorkbookSource.problem_18637 (k : ℤ) : 1^3+k+2-1+k-2=0 ↔ k = 0  :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_18637; Apache-2.0

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