PleaseHelpMe729 PleaseHelpMe729
  • 12-11-2021
  • Mathematics
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Can someone help me with this? I was wrong and cant figure it out

Can someone help me with this I was wrong and cant figure it out class=

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Аноним Аноним
  • 12-11-2021

Answer:

A.  21.

Step-by-step explanation:

4x + 2 = 31 + 55  (external angle of a triangle theorem).

4x + 2 = 86

4x = 86 - 2

4x = 84

x = 84/4 = 21.

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