Respuesta :
The answer would be 15 because I know I did it but I don't know how to show it
the answer is 8
so, -2x - 4 + 12 + 2x
= -2x + 2x - 4 + 12
= 0 - 4 + 12
= 12 - 4
= 8
so, -2x - 4 + 12 + 2x
= -2x + 2x - 4 + 12
= 0 - 4 + 12
= 12 - 4
= 8