SOLUTION: http://postimg.org/image/lk3fus5hh/ This is one of the answers I got wrong. Can someone be very specific in how to solve?

Algebra ->  Length-and-distance -> SOLUTION: http://postimg.org/image/lk3fus5hh/ This is one of the answers I got wrong. Can someone be very specific in how to solve?      Log On


   

Question 1020128: http://postimg.org/image/lk3fus5hh/
This is one of the answers I got wrong. Can someone be very specific in how to solve?
Answer by FrankM(1040) About Me  (Show Source):
You can put this solution on YOUR website!
The angles add to 360
X+16+3X-1+6X+5X=360
15X+15=360
15X=345
X=23