12x+9=13x+3

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Solution for 12x+9=13x+3 equation: 



12x+9=13x+3

We move all terms to the left:

12x+9-(13x+3)=0

We get rid of parentheses

12x-13x-3+9=0

We add all the numbers together, and all the variables

-1x+6=0

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

-x=-6

x=-6/-1

x=+6

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