To put the sides in order of longest to shortest, first find the largest angle -- the longest side is opposite this angle. Then, find the second largest angle and the side opposite from it to find the next largest angle, and finally, the shortest side will be opposite the smallest angle.
Well combine: 2x + 3x + x + 60 = 180 combine like terms: 6x + 60 =180 then move the 60: 6x = -120 now divide both sides by 6: x= -20 i hope this helped! :)
