diff --git a/contents/solutions/AB503.md b/contents/solutions/AB503.md
index beb6cde..155792d 100644
--- a/contents/solutions/AB503.md
+++ b/contents/solutions/AB503.md
@@ -17,4 +17,4 @@ Die Formeln ineinander einsetzen:
 $\rightarrow W = \frac{U^2}{R} \cdot t $
 
 Nun die gegebenen Werte einsetzen:  
-$\rightarrow W = \frac{\left(\qty{10}{\volt}\right)^2}{\qty{100}{\ohm}} \cdot\qty{1}{\hour}= \frac{\qty{100}{\volt^2}}{\qty{100}{\volt/\ampere}} \cdot\qty{1}{\hour}= \frac{\qty{100}{\volt\ampere\hour}}{100} = \qty{1}{\watt}$
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+$\begin{align}\rightarrow W = \frac{\left(\qty{10}{\volt}\right)^2}{\qty{100}{\ohm}} \cdot\qty{1}{\hour} = \frac{\qty{100}{\volt\squared}}{\qty{100}{\volt\per\ampere}} \cdot\qty{1}{\hour} = \qty{\frac{100}{100}}{\volt\ampere} \cdot\qty{1}{\hour} &= \qty{1}{\volt\ampere}\cdot\qty{1}{\hour} = \qty{1}{\watt\hour}\\ &= \qty{1}{\volt\ampere}\cdot\qty{3600}{\second} = \qty{3600}{\watt\second} = \qty{3600}{\joule}\end{align}$
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