Answer: x = 70
Step-by-step explanation: the sum of the angle 2x-5 and 45 deg should equal 180 deg, so 2x-5 should be equal to 135 because 180 - 45 = 135
So 2x -5 = 135. Add 5 to both sides to cancel it out. 2x = 140. divide both sides by 2 to cancel 2 on x. Answer is X=70
I think this is how you do it lol but I don't know for sure.