Answer
a contradiction
Work Step by Step
Using the properties of equality, the solution to the given equation, $
4+7x=7(x+1)
$, is
\begin{array}{l}
4+7x=7x+7
\\\\
7x-7x=7-4
\\\\
0=3
\text{ (FALSE)}
.\end{array}
Since the solution above ended with a FALSE statement, then the given equation is a contradiction.