6z-4=z+21

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Solution for 6z-4=z+21 equation: 



6z-4=z+21

We move all terms to the left:

6z-4-(z+21)=0

We get rid of parentheses

6z-z-21-4=0

We add all the numbers together, and all the variables

5z-25=0

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

5z=25

z=25/5

z=5

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