diff --git a/.idea/Projekttage.iml b/.idea/Projekttage.iml
index 6711606..f3d7bc9 100644
--- a/.idea/Projekttage.iml
+++ b/.idea/Projekttage.iml
@@ -2,7 +2,7 @@
 <module type="PYTHON_MODULE" version="4">
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$" />
-    <orderEntry type="inheritedJdk" />
+    <orderEntry type="jdk" jdkName="Python 3.7" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="TestRunnerService">
diff --git a/Klassen.py b/Klassen.py
index 788df30..4c567c7 100644
--- a/Klassen.py
+++ b/Klassen.py
@@ -33,7 +33,7 @@ class Formel:
             pass
 
         def _solve_to_d(self):
-            pass
+            return i - g - (a**z) * (b**y)* (c**x) / e * f
 
         def _solve_to_e(self):
             pass