Respuesta :

Answer:

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Step-by-step explanation:

840060

Answer:

X is equal to 12°

Step-by-step explanation:

From the picture we can make the following equation...

90° = 3x + (x + 42°)

90° = 3x + x + 42°

4x = 90° - 42°

4x = 48°

x = 12°