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8z-6=8z-z
We move all terms to the left:
8z-6-(8z-z)=0
We add all the numbers together, and all the variables
8z-(+7z)-6=0
We get rid of parentheses
8z-7z-6=0
We add all the numbers together, and all the variables
z-6=0
We move all terms containing z to the left, all other terms to the right
z=6
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