Solve the equation \(k-3.5=21\) in order to determine for which k-values the statement is true.
Add 3.5 to both sides of the equation:
\(k-3.5+3.5=21+3.5,\\ \\k=24.5.\)
The equation \(k-3.5=21\) is true statement for \(k=24.5.\) In general, this statement is not true.
