Answer: 58 degrees
Step-by-step explanation: (Don't quote me on this) I believe that this is the way to do this. I pretty sure that this would all equal to 360 since quadrilaterals always = 360. (2x+5)+(2x+7)+x+x=360. Then you would get 6x+12=360, subtract 12 from 360 and divide that answer by 6 to get x.