Respuesta :

aklee18oo

Answer:

x = 48

Step-by-step explanation:

The two angles shown in the diagram are supplementary and add to 180° because they form a straight line. We can set up an equation:

x - 12 + 3x = 180

4x - 12 = 180

4x = 192

x = 48

Answer:

[tex]x=42[/tex] ✔︎

Step-by-step explanation:

  • ∠1 + ∠2=180
  • 3x+x-12=180
  • 4x-12=180
  • 4x=180-12
  • 4x=168
  • x=42°

∠1= 3x=3×42=126°

∠2=x-12=42-12= 30°

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hope it helps...

have a great day!!

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