Respuesta :

laurellee27

Answer:

18a - b - 8c

Step-by-step explanation:

(15a-7b+4c)-(-3a-6b+12c)

(15a - - 3a) + (-7b - - 6b) + (4c - 12c)

18a - b - 8c

Answer:

12a-13b+16c

Step-by-step explanation: