12.x-6.x-13=26+3.x

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Solution for 12.x-6.x-13=26+3.x equation: 



12.x-6.x-13=26+3.x

We move all terms to the left:

12.x-6.x-13-(26+3.x)=0

We add all the numbers together, and all the variables

12.x-6.x-(3.x+26)-13=0

We add all the numbers together, and all the variables

6x-(3.x+26)-13=0

We get rid of parentheses

6x-3.x-26-13=0

We add all the numbers together, and all the variables

3x-39=0

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

3x=39

x=39/3

x=13

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