-20z-9=-19z

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



-20z-9=-19z

We move all terms to the left:

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

We get rid of parentheses

-20z+19z-9=0

We add all the numbers together, and all the variables

-1z-9=0

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

-z=9

z=9/-1

z=-9

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