z/2+-12=-21

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Solution for z/2+-12=-21 equation: 



z/2+-12=-21

We move all terms to the left:

z/2+-12-(-21)=0

We add all the numbers together, and all the variables

z/2+9=0

We multiply all the terms by the denominator


z+9*2=0

We add all the numbers together, and all the variables

z+18=0

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

z=-18

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