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4z+12=2(4z-2)
We move all terms to the left:
4z+12-(2(4z-2))=0
We calculate terms in parentheses: -(2(4z-2)), so:We get rid of parentheses
2(4z-2)
We multiply parentheses
8z-4
Back to the equation:
-(8z-4)
4z-8z+4+12=0
We add all the numbers together, and all the variables
-4z+16=0
We move all terms containing z to the left, all other terms to the right
-4z=-16
z=-16/-4
z=+4
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