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2z+2.2=6.8
We move all terms to the left:
2z+2.2-(6.8)=0
We add all the numbers together, and all the variables
2z-4.6=0
We move all terms containing z to the left, all other terms to the right
2z=4.6
z=4.6/2
z=2+0.6/2
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