Question

The measures of the exterior angles of a pentagon are x', 38°, 45°,
5x", and 72. Solve for x.

Answer 1

Explanation:

sum of exterior angles of a polygon=360°

x+38+45+5x+72=360

6x=360-155=205

x=205/6=34 1/6

second question

x+3x+4x+5x+7x=360

20x=360

x=360/20=18

x=18