4z+9=z*21

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Solution for 4z+9=z*21 equation: 



4z+9=z*21

We move all terms to the left:

4z+9-(z*21)=0

We add all the numbers together, and all the variables

4z-(+z*21)+9=0

We get rid of parentheses

4z-z*21+9=0

Wy multiply elements

4z-21z+9=0

We add all the numbers together, and all the variables

-17z+9=0

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

-17z=-9

z=-9/-17

z=9/17

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