27=12-x

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Solution for 27=12-x equation: 



27=12-x

We move all terms to the left:

27-(12-x)=0

We add all the numbers together, and all the variables

-(-1x+12)+27=0

We get rid of parentheses

1x-12+27=0

We add all the numbers together, and all the variables

x+15=0

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

x=-15

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