2z+-19=-21

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Solution for 2z+-19=-21 equation: 



2z+-19=-21

We move all terms to the left:

2z+-19-(-21)=0

We add all the numbers together, and all the variables

2z+2=0

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

2z=-2

z=-2/2

z=-1

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