Respuesta :

banana068313

Answer:

a = -1

Step-by-step explanation:

4a3a = (4+3)2-5 = 7a

12a = 14a - 5 = 7a

12a = 14a - 5 - 7a = 0

12a -14a + 5 + 7a = 0

(12 - 14 +7)a + 5 = 0

5a + 5 = 0

5a = -5

a = -1

i don't know if its right or not