8+7z=-20

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Solution for 8+7z=-20 equation: 



8+7z=-20

We move all terms to the left:

8+7z-(-20)=0

We add all the numbers together, and all the variables

7z+28=0

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

7z=-28

z=-28/7

z=-4

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