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z-3.8z-6.3=-8.5
We move all terms to the left:
z-3.8z-6.3-(-8.5)=0
We add all the numbers together, and all the variables
-2.8z+2.2=0
We move all terms containing z to the left, all other terms to the right
-2.8z=-2.2
z=-2.2/-2.8
z=1/1.2727272727273
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