lean_workbook_plus_10457

Proved

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

$I=\frac{S}{20}-\frac{S}{30}=\frac{S}{60}$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_10457 (s : ℝ) : s / 20 - s / 30 = s / 60   :=  by sorry

Source