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4(2z/2)=82
We move all terms to the left:
4(2z/2)-(82)=0
We add all the numbers together, and all the variables
4(+2z/2)-82=0
We multiply parentheses
8z-82=0
We move all terms containing z to the left, all other terms to the right
8z=82
z=82/8
z=10+1/4
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