12z-9=9z

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Solution for 12z-9=9z equation: 



12z-9=9z

We move all terms to the left:

12z-9-(9z)=0

We add all the numbers together, and all the variables

3z-9=0

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

3z=9

z=9/3

z=3

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