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-4=-Z-6
We move all terms to the left:
-4-(-Z-6)=0
We add all the numbers together, and all the variables
-(-1Z-6)-4=0
We get rid of parentheses
1Z+6-4=0
We add all the numbers together, and all the variables
Z+2=0
We move all terms containing Z to the left, all other terms to the right
Z=-2
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