Respuesta :

pegah
for this question you can just divide the both sides by -7 so you gonna have : 
-7b/-7 = -42/-7 ⇒ b = 6 :)))
i hope this is helpful 
have a nice day 
TSO
[tex]-7b = -42\\\\b = \frac{-42}{-7}\\\\\boxed{\bf{b = 6}}[/tex]

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