Question

Find the value of x.

Answer 1

$\large \mathfrak{Solution : }$

The given pair of angles are vertical opposite angle pair so, they are equal. i.e

• $(x + 90)\degree = 4x\degree$

• $(4x - x) \degree= 90\degree$

• $3x\degree = 90\degree$

• $x\degree = \dfrac{90\degree}{3\degree}$

• $x\degree = 30\degree$

Answer 2

Answer:

Step-by-step explanation:

     4x = x+90 ( being vertically opposite angles )

or,  4x - x = 90

or,  3x = 90

or, x = 90/3

or, x = 30

∴ x = 30

4x = 4*30 = 120

x + 90 = 30 + 90 = 120