Respuesta :

jcherry99

Answer:

20

Step-by-step explanation:

Vertical angles are always equal to each other. So the answer is

3x + 4 = 73 - 9                 Are you sure this is what the question is?

3x + 4 = 64                      Subtract 4 from both sides

     -4      -4

3x = 60                           Divide by 3

3x/3 = 60/3

x = 20

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