-5z-4z=5z-1+7z

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Solution for -5z-4z=5z-1+7z equation: 



-5z-4z=5z-1+7z

We move all terms to the left:

-5z-4z-(5z-1+7z)=0

We add all the numbers together, and all the variables

-5z-4z-(12z-1)=0

We add all the numbers together, and all the variables

-9z-(12z-1)=0

We get rid of parentheses

-9z-12z+1=0

We add all the numbers together, and all the variables

-21z+1=0

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

-21z=-1

z=-1/-21

z=1/21

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