Prove2Me

Cancelling a common addend in an equation

Proved
WorkbookSource.problem_12448

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

lean-workbooksource-checked

Solve for xx in the equation 19+x=1919 + x = 19.

Source: InternLM Lean-Workbook, record lean_workbook_12448 (Apache-2.0). The complete source proposition and explicit variable declarations are preserved.

Preamble
import Mathlib
open Real Nat
Formal statement
theorem WorkbookSource.problem_12448 (x : ℝ) (h : 19 + x = 19) : x = 0  :=  by sorry
Source
https://huggingface.co/datasets/internlm/Lean-Workbook/blob/main/lean_workbook.json, record lean_workbook_12448; Apache-2.0

View graph