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6.8=2z+3.2
We move all terms to the left:
6.8-(2z+3.2)=0
We get rid of parentheses
-2z-3.2+6.8=0
We add all the numbers together, and all the variables
-2z+3.6=0
We move all terms containing z to the left, all other terms to the right
-2z=-3.6
z=-3.6/-2
z=1+1/1.25
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