Respuesta:
c)15
Explicación paso a paso:
(-6+(4+2)-(-9))-(-4)-(+7-5)+(12))+7-15=
(-6)+(6)-(9))(-4)-(-12)+12))+7-15=
(-21)-(28)+7-15=
(7)+7-15= 15
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Respuesta:
c)15
Explicación paso a paso:
(-6+(4+2)-(-9))-(-4)-(+7-5)+(12))+7-15=
(-6)+(6)-(9))(-4)-(-12)+12))+7-15=
(-21)-(28)+7-15=
(7)+7-15= 15