Question

In the accompanying diagram, line a intersects line b.

Answer 1

Answer:

C. 10

Step-by-step explanation:

$(x + 5) = (2x - 5)$ (vertical angles are congruent)

$x + 5 = 2x - 5$

Add 5 to both sides

$x + 5 + 5 = 2x$

$x + 10 = 2x$

Subtract x from both sides

$10 = 2x - x$

$10 = x$

$x = 10$