Question

Solve for x

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

Answer 1

Answer:

Option D, 12

Step-by-step explanation:

4x-8=80/2

or, 4x-8=40

or, 4x=48

or, x=12

Answer 2

Answer:

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:-

$\frac{4x}{4}=\frac{48}{4}$

$x=12$

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