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-7z+-z+14z+-9z-8z=15
We move all terms to the left:
-7z+-z+14z+-9z-8z-(15)=0
determiningTheFunctionDomain -7z-z+14z-9z-8z-15++=0
We add all the numbers together, and all the variables
-11z=0
z=0/-11
z=0
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