Respuesta :

Answer:

B = 3

Step-by-step explanation:

- 4B - 16 = B - 31

Add 31 to both sides:

- 4B -16 + 31 = B - 31 + 31

- 4B + 15 = B

Add 4B to both sides:

- 4B + 4B + 15 = B + 4B

15 = 5B

Divide both sides by 5:

3 = B

Reverse the sides:

B = 3

Answer:

B = 3