Answer:
x = 30
Step-by-step explanation:
When two parallel lines are intersected by a transversal, the interior angles on the same side of the transversal are called co-interior angles and these con interior angles are supplementary.
2x + 50 + 5x - 80 = 180
2x + 5x + 50 - 80 = 180 {Combine like terms}
7x - 30 = 180 {Add 30 to both sides}
7x = 180 + 30
7x = 210 {Divide both sides by 7}
x = 210/7
x = 30
