Answer:
x = 71
Explanation:
The exterior angles of a polygon sum to 360°
sum the angles, equate to 360 and solve for x
x + 15 + 106 + 2x - 35 + x - 10 = 360 ( collect like terms on left side )
4x + 76 = 360 ( subtract 76 from both sides )
4x = 284 ( divide both sides by 4 )
x = 71