9z=4z-20

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Solution for 9z=4z-20 equation: 



9z=4z-20

We move all terms to the left:

9z-(4z-20)=0

We get rid of parentheses

9z-4z+20=0

We add all the numbers together, and all the variables

5z+20=0

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

5z=-20

z=-20/5

z=-4

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