-7z-2z=18

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Solution for -7z-2z=18 equation:



-7z-2z=18
We move all terms to the left:
-7z-2z-(18)=0
We add all the numbers together, and all the variables
-9z-18=0
We move all terms containing z to the left, all other terms to the right
-9z=18
z=18/-9
z=-2

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