7z-z=-1+2z-1-2

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Solution for 7z-z=-1+2z-1-2 equation: 



7z-z=-1+2z-1-2

We move all terms to the left:

7z-z-(-1+2z-1-2)=0

We add all the numbers together, and all the variables

7z-z-(2z-4)=0

We add all the numbers together, and all the variables

6z-(2z-4)=0

We get rid of parentheses

6z-2z+4=0

We add all the numbers together, and all the variables

4z+4=0

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

4z=-4

z=-4/4

z=-1

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