7z-12=30

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Solution for 7z-12=30 equation: 



7z-12=30

We move all terms to the left:

7z-12-(30)=0

We add all the numbers together, and all the variables

7z-42=0

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

7z=42

z=42/7

z=6

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