Answer:
X = 19
Step-by-step explanation:
Two parallel lines cut by a transversal means the corresponding angles are congruent. Set each equation equal to each other and solve for x.
2x+78= 7x-17
Add 17 to both sides: 2x + 95= 7x
Then subtract 2x from both sides: 95= 5x
divide each side by 5, for final answer: x= 19
