9z-4=-10z-21

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Solution for 9z-4=-10z-21 equation: 



9z-4=-10z-21

We move all terms to the left:

9z-4-(-10z-21)=0

We get rid of parentheses

9z+10z+21-4=0

We add all the numbers together, and all the variables

19z+17=0

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

19z=-17

z=-17/19

z=-17/19

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