6x+9=30-x

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Solution for 6x+9=30-x equation: 



6x+9=30-x

We move all terms to the left:

6x+9-(30-x)=0

We add all the numbers together, and all the variables

6x-(-1x+30)+9=0

We get rid of parentheses

6x+1x-30+9=0

We add all the numbers together, and all the variables

7x-21=0

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

7x=21

x=21/7

x=3

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