7z-9=30

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Solution for 7z-9=30 equation: 



7z-9=30

We move all terms to the left:

7z-9-(30)=0

We add all the numbers together, and all the variables

7z-39=0

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

7z=39

z=39/7

z=5+4/7

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