For Algebra I homework, Catherine was asked to solve \(5\left(y+1\right)+3=23\) for \(\textit{y}\). She put the following on the board.
Line 1
\(5\left(y+1\right)+3=23\textit{ }\)
Line 2
\(5(y+1)=20\textit{}\)
Line 3
\(5y+1=23\textit{}\)
Line 4
\(5y=22\textit{}\)
Line 5
\(\frac{5y}{5}=\frac{22}{5}\textit{}\)
Line 6
\(y=\frac{22}{5}\)
Which property did she make an error with when going from line 2 to line 3?
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