13z-(z+21)=39

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Solution for 13z-(z+21)=39 equation: 



13z-(z+21)=39

We move all terms to the left:

13z-(z+21)-(39)=0

We get rid of parentheses

13z-z-21-39=0

We add all the numbers together, and all the variables

12z-60=0

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

12z=60

z=60/12

z=5

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