6z-9=21

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Solution for 6z-9=21 equation: 



6z-9=21

We move all terms to the left:

6z-9-(21)=0

We add all the numbers together, and all the variables

6z-30=0

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

6z=30

z=30/6

z=5

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