-4=-2+2z

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



-4=-2+2z

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(2z-2)-4=0

We get rid of parentheses

-2z+2-4=0

We add all the numbers together, and all the variables

-2z-2=0

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

-2z=2

z=2/-2

z=-1

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