-12z-20=19-9z

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Solution for -12z-20=19-9z equation: 



-12z-20=19-9z

We move all terms to the left:

-12z-20-(19-9z)=0

We add all the numbers together, and all the variables

-12z-(-9z+19)-20=0

We get rid of parentheses

-12z+9z-19-20=0

We add all the numbers together, and all the variables

-3z-39=0

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

-3z=39

z=39/-3

z=-13

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