Respuesta :

crystivia

Answer:

3

Step-by-step explanation:

To solve the equation, subtract 15 from both sides

-b = -3

Since both sides are negative, we can just take away the negative signs.

b = 3

Answer:

3

Step-by-step explanation:

move 15 to the other side of the equation so, -b=15-12 then, -b=-3 and two negatives make a postive so b=3