12x-4=9-1x

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Solution for 12x-4=9-1x equation: 



12x-4=9-1x

We move all terms to the left:

12x-4-(9-1x)=0

We add all the numbers together, and all the variables

12x-(-1x+9)-4=0

We get rid of parentheses

12x+1x-9-4=0

We add all the numbers together, and all the variables

13x-13=0

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

13x=13

x=13/13

x=1

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