Respuesta :

apologiabiology
remember, you can do anything to an equation as long as you do it to both sides

so
get all the  z on one side

add 4z to both sides

1=bz+4z+c
minus c bot sides
1-c=bz+4z
undistriibute z
1-c=z(b+4)
divide both sides by b+4
[tex]\frac{1-c}{b+4}=z[/tex]
[tex]z=\frac{1-c}{b+4}[/tex]