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-3z-(-z-2)=-4z-2
We move all terms to the left:
-3z-(-z-2)-(-4z-2)=0
We add all the numbers together, and all the variables
-3z-(-1z-2)-(-4z-2)=0
We get rid of parentheses
-3z+1z+4z+2+2=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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