Respuesta :

Substitute A and B into equation:
2(-4) - (4)
=-12
:)
datducdo3

Answer:

- 12

Step-by-step explanation:

a = 4

b = - 4

2(- 4) - 4

- 8 - 4

Subtract 4 is the dame as adding its opposite which is - 4.

- 8 + (- 4)

= - 12

Hope this helps :)

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