Answer:
x = 11
Explanation:
interior angles of a triangle = 180
equation:
⇒ 82 + 31 + 6x + 1 = 180
combine like terms:
⇒ 82 + 31 + 6x + 1 = 180
⇒ 114 + 6x = 180
subtract 114 on both sides:
⇒ 114 - 114 + 6x = 180 - 114
⇒ 6x = 66
divide 6 on both sides:
⇒ 6x = 66
⇒
![(6x)/(6) = (66)/(6)](https://img.qammunity.org/2022/formulas/mathematics/high-school/2xaf9m0uwxodu92mt3gp5otxy2ibgt62uy.png)
⇒ x = 11