Impossible math puzzle!

Impossible math puzzle!

shashwatchakraborti
shashwatchakraborti
Dec 8, 2013, 6:17 AM |
4

                                     5 +5+5+5=555


Add one line in the figure to make the statement correct.

Type the answer for my sake of conviniece that you have solved this      mindboggling brainstormer!