Question

Solve for x

A. 9
B. 10
C. 42
D. 12

Answer 1

Option D, 12

Explanation:

4x-8=80/2

or, 4x-8=40

or, 4x=48

or, x=12

Answer 2

Given:-

m∠DEF= (4x-8) °

m DE= 80°

Using a property :- m ∠DEF= 1/2 (m DE)

`(4x-8)` °
`= 1/2 (80)`

`(4x-8)`°
`=(40)` °

`4x-8=40`

Add 8 to both sides:-

`4x=48`

Divide both sides by 4:-

`(4x)/(4)=(48)/(4)`

`x=12`

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