"People who fight fire with fire usually end up with ashes," is a popular saying that can relate to upset customers.

This popular saying applied to an organizational environment, can refer to upset customers in the sense that if your customers make any complaints or complaints about your products and services, you, as a professional representing the company, must be well prepared and trained to deal with this adverse situation in a way that is not a "person who fights fire with fire and ends up with ashes", that is, you must be well prepared to respond to the customer's problem in a friendly, fast way and that brings solutions that do it. return, and not in a way where the customer feels that their complaint has not been resolved well and will not do business with the company again.

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30