Respuesta :

Answer:

x = 21

Step-by-step explanation:

The sum of interiro angles in atriangle is equal to 180:

x - 4 + 100 + 3x = 180 add like terms

4x + 96 = 180 subtract 96 from both sides

4x = 84 divide both sides by 4

x = 21

Answer:

The answer is x = 21.

Step-by-step explanation:

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