12=3-7x

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Solution for 12=3-7x equation: 



12=3-7x

We move all terms to the left:

12-(3-7x)=0

We add all the numbers together, and all the variables

-(-7x+3)+12=0

We get rid of parentheses

7x-3+12=0

We add all the numbers together, and all the variables

7x+9=0

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

7x=-9

x=-9/7

x=-1+2/7

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