X=30-9x

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Solution for X=30-9x equation: 



X=30-9X

We move all terms to the left:

X-(30-9X)=0

We add all the numbers together, and all the variables

X-(-9X+30)=0

We get rid of parentheses

X+9X-30=0

We add all the numbers together, and all the variables

10X-30=0

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

10X=30

X=30/10

X=3

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