## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Using the properties of equality, the solution to the given equation, $3(x+5)=3(5+x)$, is \begin{array}{l} 3x+15=15+3x \\\\ 3x-3x=15-15 \\\\ 0=0 \text{ (TRUE)} .\end{array} Since the solution above ended with a TRUE statement, then the given equation is $\text{ an identity .}$