-20+20z-z=19z-20

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Solution for -20+20z-z=19z-20 equation: 



-20+20z-z=19z-20

We move all terms to the left:

-20+20z-z-(19z-20)=0

We add all the numbers together, and all the variables

19z-(19z-20)-20=0

We get rid of parentheses

19z-19z+20-20=0

We add all the numbers together, and all the variables

=0

z=0/1

z=0

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