Question

Find the value of x that will make A||B.

X = ?

Answer 1

For A and B to be parallel then the angle (4x+12)⁰ and the angle opposite to angle (5x)⁰ should be equal since the two are congruent to each other.

therefore

5x = opposite angle=(4x+12)

=> 5x=(4x+12)

=>5x-4x= 12

therefore

X =12⁰

Answer 2

x = 12

Explanation:

Since they are opposite exterior angles, they are congruent, so you set them equal to each other

5x = 4x + 12

- 4x - 4x

x = 12