Update explainers/explainer_algebra.py

explainers/explainer_algebra.py

@@ -1,59 +1,15 @@
-import re
-from models import ExplainerResult
-
-
-def explain_algebra_question(text: str) -> ExplainerResult | None:
-    t = text.lower()
-
-    has_equation = "=" in t
-    has_variable = bool(re.search(r"\b[a-z]\b", t))
-    has_solve_word = "solve" in t or "value of" in t
-
-    # Avoid stealing other topics
-    if "%" in t or "percent" in t or "ratio" in t or re.search(r"\b\d+\s*:\s*\d+\b", t):
-        return None
-
-    if not (has_equation or has_variable or has_solve_word):
-        return None
-
-    givens = []
-    relationships = []
-    constraints = []
-    trap_notes = []
-
-    if has_equation:
-        givens.append("An equation is given")
-
-    variables = sorted(set(re.findall(r"\b[a-z]\b", t)))
-    variables = [v for v in variables if v not in {"a", "i"}]
-
-    if variables:
-        givens.append(f"A variable appears: {', '.join(variables[:3])}")
-
-    relationships.append("Both sides of the equation must remain equal")
-    relationships.append("You need to isolate the variable")
-
-    asks_for = "the value of the variable"
-
-    trap_notes.extend([
-        "Always perform operations on both sides of the equation",
-        "Watch for sign errors",
-        "Be careful with distributing brackets",
-    ])
-
-    return ExplainerResult(
-        understood=True,
-        topic="algebra",
-        asks_for=asks_for,
-        givens=givens,
-        constraints=constraints,
-        relationships=relationships,
-        needed_concepts=[
-            "inverse operations",
-            "equation balancing",
-            "isolating variables",
-        ],
-        trap_notes=trap_notes,
-        strategy_hint="Undo operations step by step in reverse order to isolate the variable.",
-        plain_english="The question gives an equation and asks you to isolate the variable to find its value.",
-    )
+from explainer_percent import explain_percent
+from explainer_ratio import explain_ratio
+from explainer_algebra import explain_algebra
+
+
+def route_explainer(text: str):
+    for fn in (
+        explain_percent,
+        explain_ratio,
+        explain_algebra,
+    ):
+        result = fn(text)
+        if result is not None and getattr(result, "understood", False):
+            return result
+    return None