9=3x-30

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Solution for 9=3x-30 equation: 



9=3x-30

We move all terms to the left:

9-(3x-30)=0

We get rid of parentheses

-3x+30+9=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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