what is the value of X in 8x° and 140°
Not exactly sure what you are asking, but I will go with this:
8x=140 divide both sides of the equation by 8
x = 17.5 degrees
Maybe 8x + 140 = 180 ?? subtract 140 from both sides
8x = 40 divide both sodes by 8
x = 5
+36916 
