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-28z-0.5=-38z+2.8
We move all terms to the left:
-28z-0.5-(-38z+2.8)=0
We get rid of parentheses
-28z+38z-2.8-0.5=0
We add all the numbers together, and all the variables
10z-3.3=0
We move all terms containing z to the left, all other terms to the right
10z=3.3
z=3.3/10
z=2.53846153846/7.69230769231
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