2z+20z-7z+15=-15

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Solution for 2z+20z-7z+15=-15 equation: 



2z+20z-7z+15=-15

We move all terms to the left:

2z+20z-7z+15-(-15)=0

We add all the numbers together, and all the variables

15z+30=0

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

15z=-30

z=-30/15

z=-2

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