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13 changes: 2 additions & 11 deletions EasyLean/Basic.lean
Original file line number Diff line number Diff line change
@@ -1,12 +1,3 @@
import Mathlib.Data.Real.Basic
import Mathlib.Tactic.Linarith
import EasyLean.Mathd.Algebra.MathdAlgebra513

theorem mathd_algebra_513
(a b : ℝ)
(h₀ : 3 * a + 2 * b = 5)
(h₁ : a + b = 2) :
a = 1 ∧ b = 1 := by
sorry

theorem eq_four : ∀ a b c d : Nat, a = b → a = d → a = c → c = b := by
sorry
open EasyLean.Mathd.Algebra
13 changes: 13 additions & 0 deletions EasyLean/Mathd/Algebra/MathdAlgebra513.lean
Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
import Mathlib.Data.Real.Basic
import Mathlib.Tactic.Linarith

namespace EasyLean.Mathd.Algebra

/-- Solve the system `3a + 2b = 5`, `a + b = 2`. -/
theorem mathd_algebra_513 (a b : ℝ) (h₀ : 3 * a + 2 * b = 5) (h₁ : a + b = 2) :
a = 1 ∧ b = 1 := by
constructor
· linarith [h₀, h₁]
· linarith [h₀, h₁]

end EasyLean.Mathd.Algebra