7z-4=80

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Solution for 7z-4=80 equation: 



7z-4=80

We move all terms to the left:

7z-4-(80)=0

We add all the numbers together, and all the variables

7z-84=0

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

7z=84

z=84/7

z=12

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