[tex]-8= -2(z+7) [/tex] [tex]Equation [/tex]
[tex] \dfrac{-8}{-2} =z+7
[/tex] [tex]Divide \ both \ sides \ by \ -2[/tex]
[tex] \dfrac{8}{2} =z+7 [/tex]
[tex]4=z+7
[/tex]
[tex]4-7=z[/tex] [tex]Subtract \ 7 \ from \ both \ sides[/tex]
[tex]z=-3[/tex] [tex]Solution [/tex]