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8=-2(-2-2z)
We move all terms to the left:
8-(-2(-2-2z))=0
We add all the numbers together, and all the variables
-(-2(-2z-2))+8=0
We calculate terms in parentheses: -(-2(-2z-2)), so:We get rid of parentheses
-2(-2z-2)
We multiply parentheses
4z+4
Back to the equation:
-(4z+4)
-4z-4+8=0
We add all the numbers together, and all the variables
-4z+4=0
We move all terms containing z to the left, all other terms to the right
-4z=-4
z=-4/-4
z=1
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