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-5.2-z=6.5
We move all terms to the left:
-5.2-z-(6.5)=0
We add all the numbers together, and all the variables
-1z-11.7=0
We move all terms containing z to the left, all other terms to the right
-z=11.7
z=11.7/-1
z=-11+0.7/1
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