-20=z-9

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Solution for -20=z-9 equation: 



-20=z-9

We move all terms to the left:

-20-(z-9)=0

We get rid of parentheses

-z+9-20=0

We add all the numbers together, and all the variables

-1z-11=0

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

-z=11

z=11/-1

z=-11

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