Z=21+3z

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Solution for Z=21+3z equation: 



=21+3Z

We move all terms to the left:

-(21+3Z)=0

We add all the numbers together, and all the variables

-(3Z+21)=0

We get rid of parentheses

-3Z-21=0

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

-3Z=21

Z=21/-3

Z=-7

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