Respuesta :

choixongdong

Answer:

x = 12

Step-by-step explanation:

Supplementary angles, sum = 180

10x - 20 + 6x + 8 = 180

16x - 12 = 180

16x = 192

   x = 12

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➷ Angles on a straight line equal 180

Therefore:

10x - 20 + 6x + 8 = 180

Simplify:

16x - 12 = 180

Add 12 to both sides:

16x = 192

Divide both sides by 16:

x = 12

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