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2z-8.2=0.3
We move all terms to the left:
2z-8.2-(0.3)=0
We add all the numbers together, and all the variables
2z-8.5=0
We move all terms containing z to the left, all other terms to the right
2z=8.5
z=8.5/2
z=4+0.5/2
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