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8=-z-4/2
We move all terms to the left:
8-(-z-4/2)=0
We add all the numbers together, and all the variables
-(-1z-2)+8=0
We get rid of parentheses
1z+2+8=0
We add all the numbers together, and all the variables
z+10=0
We move all terms containing z to the left, all other terms to the right
z=-10
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