Respuesta:
31
Explicación paso a paso:
[6+6-(-9)]-[(-4)-(2)+(-12)]+7-15
[6+6+(+9)]-[(-4)+(-2)+(-12)]+7-15
21-[-18]+7-15
21+(+18)+7-15=
46-15=31
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Verified answer
Respuesta:
31
Explicación paso a paso:
[6+6-(-9)]-[(-4)-(2)+(-12)]+7-15
[6+6+(+9)]-[(-4)+(-2)+(-12)]+7-15
21-[-18]+7-15
21+(+18)+7-15=
46-15=31