Answer:
x = 10
Step-by-step explanation:
Since the lines are parallel, the 2 angles are corresponding and congruent, that is
7x - 1 = 5x + 19 ( subtract 5x from both sides )
2x - 1 = 19 ( add 1 to both sides )
2x = 20 ( divide both sides by 2 )
x = 10
