-20-4z-20=20-8z

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Solution for -20-4z-20=20-8z equation: 



-20-4z-20=20-8z

We move all terms to the left:

-20-4z-20-(20-8z)=0

We add all the numbers together, and all the variables

-4z-(-8z+20)-20-20=0

We add all the numbers together, and all the variables

-4z-(-8z+20)-40=0

We get rid of parentheses

-4z+8z-20-40=0

We add all the numbers together, and all the variables

4z-60=0

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

4z=60

z=60/4

z=15

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