Answer:
x = 7
Step-by-step explanation:
Adjacent angles of a parallelogram are supplementary.
[tex] \therefore \: (14x + 2) \degree + 80 \degree = 180 \degree \\ \\ \therefore \: (14x + 2) \degree = 180 \degree - 80 \degree \\ \\ \therefore \: (14x + 2) \degree = 100 \degree \\ \\ 14x + 2 = 100 \\ 14x = 100 - 2 \\ \\ 14x = 98 \\ \\ x = \frac{98}{14} \\ \\ x = 7[/tex]
