Respuesta :

Answer:

x = 12

a = 22

Step-by-step explanation:

2(3x-3.5) = 65 [vertically opposite angles]

3x - 3.5 = 65/2

3x = 65/2 + 7/2

3x = 72/2

3x = 36

x = 36/3

x = 12

2(3x-3.5)+4a+27 = 180° [Angles in a straight line add upto 180]

6x-7+4a+27 = 180°

6x+4a = 160°

Substituting 'x':

72 + 4a = 160

4a = 160-72

a = 88/4

a = 22

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