Respuesta :

Answer:

D. 9

Step-by-step explanation:

We can say [tex]5x+3=48[/tex]° because of Same Side Interior and Exterior angles

Solve

[tex]5x+3=48[/tex]

Subtract 3 from both sides

[tex]5x=45[/tex]

Divide both sides by 5

[tex]x=9[/tex]

Answer:

9

Step-by-step explanation5x + 3 = 48

5x = 48 - 3

5x = 45

x = 9