3x+9=+12x

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Solution for 3x+9=+12x equation: 



3x+9=+12x

We move all terms to the left:

3x+9-(+12x)=0

We get rid of parentheses

3x-12x+9=0

We add all the numbers together, and all the variables

-9x+9=0

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

-9x=-9

x=-9/-9

x=1

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