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