Question

∠A and \angle B∠B are vertical angles. If m\angle A=(3x-9)^{\circ}∠A=(3x−9) ∘ and m\angle B=(x+3)^{\circ}∠B=(x+3) ∘ , then find the value of x.

Answer 1

Answer:

x = 6

Step-by-step explanation:

Vertical angles are congruent, thus

∠ A = ∠ B , substitute values

3x - 9 = x + 3 ( subtract x from both sides )

2x - 9 = 3 ( add 9 to both sides )

2x = 12 ( divide both sides by 2 )

x = 6

Answer 2

Answer:

x = -3

Step-by-step explanation: