We know that 2x + 10 is equal to 86 + x because of vertically opposite angles and from this we can form an equation: 2x + 10 = x + 86
Firstly, take away x from both sides to get x + 10 = 86
Now take away 10 from both sides and we get x = 76
Hope this helps and a Brainliest would be very appreciated
