-20-20z=20-10z-20z

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Solution for -20-20z=20-10z-20z equation: 



-20-20z=20-10z-20z

We move all terms to the left:

-20-20z-(20-10z-20z)=0

We add all the numbers together, and all the variables

-20z-(-30z+20)-20=0

We get rid of parentheses

-20z+30z-20-20=0

We add all the numbers together, and all the variables

10z-40=0

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

10z=40

z=40/10

z=4

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