Respuesta :

 b = -9 that is the answer that i came up with i passed algebra with a A+ so that should be it.
[tex]3b + 9 = -18[/tex] 

[tex]3b=-18-9[/tex] 

[tex]3b=-27[/tex] 

[tex]b=-27/3[/tex] 

[tex]b=-9[/tex]

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