9+8z=-9+10z

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Solution for 9+8z=-9+10z equation: 



9+8z=-9+10z

We move all terms to the left:

9+8z-(-9+10z)=0

We add all the numbers together, and all the variables

8z-(10z-9)+9=0

We get rid of parentheses

8z-10z+9+9=0

We add all the numbers together, and all the variables

-2z+18=0

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

-2z=-18

z=-18/-2

z=+9

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