-4+-2z=-8

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Solution for -4+-2z=-8 equation: 



-4+-2z=-8

We move all terms to the left:

-4+-2z-(-8)=0

We add all the numbers together, and all the variables

-2z+4=0

We move all terms containing z to the left, all other terms to the right

-2z=-4

z=-4/-2

z=+2

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