-1=2+z

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Solution for -1=2+z equation: 



-1=2+z

We move all terms to the left:

-1-(2+z)=0

We add all the numbers together, and all the variables

-(z+2)-1=0

We get rid of parentheses

-z-2-1=0

We add all the numbers together, and all the variables

-1z-3=0

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

-z=3

z=3/-1

z=-3

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