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3(z-8.2)=12.6
We move all terms to the left:
3(z-8.2)-(12.6)=0
We add all the numbers together, and all the variables
3(z-8.2)-12.6=0
We multiply parentheses
3z-24.6-12.6=0
We add all the numbers together, and all the variables
3z-37.2=0
We move all terms containing z to the left, all other terms to the right
3z=37.2
z=37.2/3
z=12+1/2.5
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