4z-9+5z=12-+7z-7

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Solution for 4z-9+5z=12-+7z-7 equation: 



4z-9+5z=12-+7z-7

We move all terms to the left:

4z-9+5z-(12-+7z-7)=0

We add all the numbers together, and all the variables

4z+5z-(7z+19)-9=0

We add all the numbers together, and all the variables

9z-(7z+19)-9=0

We get rid of parentheses

9z-7z-19-9=0

We add all the numbers together, and all the variables

2z-28=0

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

2z=28

z=28/2

z=14

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