Question

Can you please tell the value of x? Thx

Answer 1

An exterior angle is equal to the sum of two opposite interior angles.
So,
2x = 63 + x - 5
2x - x = 63-5
x = 58
Hence, the value of x is 58°.

Answer 2

external angle is equal to the sum of the other 2 internal angles

2x=x-5+63
minus x from both sides
x=-5+63
x=58

x=58°