-5z-7z+9z=-9

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Solution for -5z-7z+9z=-9 equation: 



-5z-7z+9z=-9

We move all terms to the left:

-5z-7z+9z-(-9)=0

We add all the numbers together, and all the variables

-3z+9=0

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

-3z=-9

z=-9/-3

z=+3

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