2-7z=21

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Solution for 2-7z=21 equation: 



2-7z=21

We move all terms to the left:

2-7z-(21)=0

We add all the numbers together, and all the variables

-7z-19=0

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

-7z=19

z=19/-7

z=-2+5/7

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