4z-9=z-12

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Solution for 4z-9=z-12 equation: 



4z-9=z-12

We move all terms to the left:

4z-9-(z-12)=0

We get rid of parentheses

4z-z+12-9=0

We add all the numbers together, and all the variables

3z+3=0

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

3z=-3

z=-3/3

z=-1

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