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2z-7.1=9.8
We move all terms to the left:
2z-7.1-(9.8)=0
We add all the numbers together, and all the variables
2z-16.9=0
We move all terms containing z to the left, all other terms to the right
2z=16.9
z=16.9/2
z=8+0.9/2
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