Respuesta :

Snor1ax

Answer: d=42

Step-by-step explanation:

Both angles are in a supplementary (straight with 180 degrees) line bisected by an angle, so use the supplementary angle theory

(d+7)+(3d+5)=180

4d+12=180

4d=168

d=42

Solution:

Note that:

  • d + 7 + 3d + 5 = 180

Solve the equation to obtain the value of d.

  • d + 7 + 3d + 5 = 180
  • => 4d + 12 = 180
  • => 4d = 180 - 12
  • => 4d = 168
  • => d = 168/4
  • => d = 42

The value of d is 42.

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