Prove2Me

Solving a strict linear inequality

Proved
WorkbookSource.problem_24117

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

lean-workbooksource-checked

Find all real numbers xx for which 3−x>x+13-x > x+1

Source: InternLM Lean-Workbook, record lean_workbook_24117 (Apache-2.0). The complete source proposition and explicit variable declarations are preserved.

Preamble
import Mathlib
open Real Nat
Formal statement
theorem WorkbookSource.problem_24117 (x : ℝ) : 3 - x > x + 1 ↔ x < 1  :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_24117; Apache-2.0

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