7z+2z-8z+4z-4z=12

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Solution for 7z+2z-8z+4z-4z=12 equation: 



7z+2z-8z+4z-4z=12

We move all terms to the left:

7z+2z-8z+4z-4z-(12)=0

We add all the numbers together, and all the variables

z-12=0

We move all terms containing z to the left, all other terms to the right

z=12

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