(3x-9)=30

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Solution for (3x-9)=30 equation: 



(3x-9)=30

We move all terms to the left:

(3x-9)-(30)=0

We get rid of parentheses

3x-9-30=0

We add all the numbers together, and all the variables

3x-39=0

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

3x=39

x=39/3

x=13

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