+687 The interior angles formed by the sides of a quadrilateral have measures that sum to 360°. What is the measure of angle A?
https://snag.gy/FkeA9Q.jpg
+37153 Add them all together and equate to 360 (as stated in the Question)....then solve for x and calculate A....
try to do this yourself, post here if you need more help! 
+37153 Not sure where you went off-course....add them all together and equate to 360:
(3x-6) + 2x + 108 + 88 = 360 gather 'like terms'
3x + 2x + (108+88-6) = 360 simplify
5 x + 190 = 360 subtract 190 from each side of the equation
5x = 170
x = 34
Angle A is shown as 3 x - 6 3 (34) - 6 = 96 degrees
+687 Oh i did it like this
3x-6+2x+88+108=360
solved and got 34
then i substituted x for 34 in the A equation
3+34-6 and got 31..
+37153 Auugh.... do you see where you got off-course! Your boat is now stuck on the reef doing tremendous damage !
it is 3 * x -6 not 3 + x -6
