Answer :

nermay7

Answer: The value of x is 6.  The measure of angle B is 20 degrees.

Step-by-step explanation:

3x + 2  + 55 = 13x- 3

3x + 57 = 13x -3

-3x         -3x  

   57 = 10x -3

   +3            +3

60= 10x

x= 6

  3(6) +2 = m∠B

 20= m∠B

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