Respuesta :

JcAlmighty
The answer is D.1/2

[tex]a= 10 \\ b=-9 \\ \frac{6-b}{3a} = \frac{6-(-9)}{3*10}= \frac{6+9}{30} = \frac{15}{30} = \frac{15:15}{30:15} = \frac{1}{2} [/tex]

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