12=12-7x

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Solution for 12=12-7x equation: 



12=12-7x

We move all terms to the left:

12-(12-7x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

7x-12+12=0

We add all the numbers together, and all the variables

7x=0

x=0/7

x=0

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