Respuesta :

leumitica
[tex]-10= \frac{-b}{4} [/tex]
Common denominator is 4
[tex]4(-10)= \frac{\not 4(-b)}{\not 4} [/tex]
[tex]4(-10)=-b[/tex]
[tex]-40=-b[/tex]
Multiply by 1
[tex]b=40[/tex]
The answer is: b=40
antonio9990
[tex]\boxed{-10= \frac{-b}{4} } \ \to -b=-10*4=\boxed{-40} \\ \\ \\\\\huge\text{The answer is -b=-40}[/tex]

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