Answer:
8
Explanation:
The interior angles of a triangle add to 180°. Thus;
(9x - 13) + (7x + 3) + 62 = 180
9x + 7x - 13 + 3 + 62 = 180
16x + 52 = 180
16x = 180 - 52
16 x = 128
x = 128/16
x = 8
The angles of the triangle are:
9x - 13 = 59°
7x + 3 = 59°
62°