Question

ZA and ZB are vertical angles. If mA = (5x + 5)° and mZB = (6x − 8),
then find the value of x.

Answer 1

x = 13

Explanation:

vertical angles are congruent , then

∠ B = ∠ A , that is

6x - 8 = 5x + 5 ( subtract 5x from both sides )

x - 8 = 5 ( add 8 to both sides )

x = 13