30=3-9z

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Solution for 30=3-9z equation: 



30=3-9z

We move all terms to the left:

30-(3-9z)=0

We add all the numbers together, and all the variables

-(-9z+3)+30=0

We get rid of parentheses

9z-3+30=0

We add all the numbers together, and all the variables

9z+27=0

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

9z=-27

z=-27/9

z=-3

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