Answer:
x = 70
Explanation:
Remark
There are 6 sides. The sum of the interior angles is (n - 2)*180. n in this case is 6.
(6 - 2 ) * 180 = 720
Equation
102 + 146 + 120 + 124 + 158 + x = 720 Combine like terms
Solution
x + 650 = 720 Subtract 650
x = 720 - 650 Combine
x = 70