Respuesta :

9514 1404 393

Answer:

  a +9b +c

Step-by-step explanation:

  (14a+3b-6c) -(7a-2b-10c)​ -(6a-4b+3c)

  = a(14 -7 -6) +b(3 +2 +4) +c(-6 +10 -3)

  = a +9b +c

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