Respuesta :

We can solve this by part:

[tex]\begin{gathered} -12+8-(-9)=-12+8+(-1)\cdot(-9) \\ -12+8-(-9)=-12+8+9 \\ -12+8-(-9)=-12+(8+9) \\ -12+8-(-9)=-12+17 \\ -12+8-(-9)=17-12 \\ -12+8-(-9)=5 \end{gathered}[/tex]

The answer is 5

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