Respuesta :

Answer:

-18

Step-by-step explanation:

[tex]3-3(6-(3-7))+3(7-4)\\\\=3-3(6-(-4))+3(7-4)\\\\=3-3(6+4)+3(7-4)\\\\=3-3(10)+3(7-4)\\\\=3-3(10)+3(3)\\\\=3-30+3(3)\\\\=3-30+9\\\\=-27+9\\\\=-18[/tex]

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