Respuesta :

Answer:

x = 51 degrees

Step-by-step explanation:

2x - 12 = 90

 +12      +12

2x   = 102

div 2     div 2

  x   = 51

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Answer:

x=51

Step-by-step explanation:

Both angles should add up to 90 degrees

90=x+(x-12)

90=2x-12

102=2x

51=x