Answer:
x = 14
Step-by-step explanation:
The sum of the interior angle of a regular polygon is 540 degrees
Since the interior angles are 5, then;
5(9x - 18) = 540
Expand the bracket
5(9x) - 5(18) = 540
45x - 90 = 540
45x = 540 + 90
45x = 630
x = 630/45
x = 14
Hence the value of x is 14
