-2=18+z

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Solution for -2=18+z equation: 



-2=18+z

We move all terms to the left:

-2-(18+z)=0

We add all the numbers together, and all the variables

-(z+18)-2=0

We get rid of parentheses

-z-18-2=0

We add all the numbers together, and all the variables

-1z-20=0

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

-z=20

z=20/-1

z=-20

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