7(z-9)=-21

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Solution for 7(z-9)=-21 equation: 



7(z-9)=-21

We move all terms to the left:

7(z-9)-(-21)=0

We add all the numbers together, and all the variables

7(z-9)+21=0

We multiply parentheses

7z-63+21=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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