Rearranging a linear equation

Proved

WorkbookSource.problem_30144

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

lean-workbooksource-checked

Let $x+1=0 \to x=-1$ and $a=-3$ .

Source: InternLM Lean-Workbook, record lean_workbook_30144 (Apache-2.0). The complete source proposition and explicit variable declarations are preserved.

Preamble

import Mathlib
open Real Nat

Formal statement

theorem WorkbookSource.problem_30144 (x a : ℝ) (h₁ : x + 1 = 0) (h₂ : a = -3) : x = -1 ∧ a = -3  :=  by sorry

Source

https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_30144; Apache-2.0

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