-7-3z-9z=9-10z

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Solution for -7-3z-9z=9-10z equation: 



-7-3z-9z=9-10z

We move all terms to the left:

-7-3z-9z-(9-10z)=0

We add all the numbers together, and all the variables

-3z-9z-(-10z+9)-7=0

We add all the numbers together, and all the variables

-12z-(-10z+9)-7=0

We get rid of parentheses

-12z+10z-9-7=0

We add all the numbers together, and all the variables

-2z-16=0

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

-2z=16

z=16/-2

z=-8

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