Answer
\begin{array}{c|ll}& \textbf{Statement} & \textbf{Reasons}
\\\hline1 & \text{5x+1=21} & \text{(a) Given}
\\2 & \text{5x=20} & \text{(b) Subtraction Property of Equality}
\\3 & \text{x=4} & \text{(c) Division Property of Equality}
\end{array}
Work Step by Step
1) The starting equation is always given.
2) 1 was subtracted from each side.
3) Each side was divided by 5.
