-3z-7z=40

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Solution for -3z-7z=40 equation: 



-3z-7z=40

We move all terms to the left:

-3z-7z-(40)=0

We add all the numbers together, and all the variables

-10z-40=0

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

-10z=40

z=40/-10

z=-4

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