Fix this.
 

To the equation below, add a single line to correct it.
The line maybe added anywhere except through the = sign.
Spoiler your answer.

[TEX]5 + 5 + 5 = 550[/TEX]

I think I've just seen Mally's ghost:smile:

[spoiler]5 4 5 + 5 = 550 the line extends upward from the leftmost point of the first plus sign[/spoiler]

Retina is right.