This is a very interesting equation.
Remember: The "solution" to the equation is the number that ' k ' must be
in order to make the equation a true statement.
-3k = -5k
Divide each side of the equation by ' k ' .
Then you have
-3 = -5 .
Is there ANY value for ' k ' that can make that a true statement ?
I don't think so.
This equation has NO solution.