Step-by-step explanation:
5 because if you plug in to get the equation 3x+20=7x then subtract 3x from both sides and divide by 4 from both sides
Angle x = 83 degrease. all angles, when added, of a triangle equal 180 degrease, using this, we can add the two we know together and then subtract them from 180 to get our answer. 44 + 53 = 97, 180 - 97 = 83.
Hope this Helps, Good luck!