Respuesta:
1. a+b+c
(-4)+(-7)+(8)
-4-7+8
-3
2. b+c
(-2)+(4)
-2+4
+2
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Respuesta:
1. a+b+c
(-4)+(-7)+(8)
-4-7+8
-3
2. b+c
(-2)+(4)
-2+4
+2